diff --git a/Gemfile b/Gemfile
index 1f478929..ed9f0190 100644
--- a/Gemfile
+++ b/Gemfile
@@ -3,3 +3,6 @@ ruby '2.0.0'
 
 gem 'rspec', '~> 2.14.1'
 gem 'pry-byebug'
+gem 'sinatra', '~> 1.4.5'
+gem 'pg'
+gem 'sinatra-reloader'
\ No newline at end of file
diff --git a/Gemfile.lock b/Gemfile.lock
index db516937..ebaa436a 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,36 +1,60 @@
 GEM
   remote: https://rubygems.org/
   specs:
+    backports (3.6.4)
+    byebug (3.5.1)
+      columnize (~> 0.8)
+      debugger-linecache (~> 1.2)
+      slop (~> 3.6)
     coderay (1.1.0)
-    columnize (0.3.6)
-    debugger (1.6.5)
-      columnize (>= 0.3.1)
-      debugger-linecache (~> 1.2.0)
-      debugger-ruby_core_source (~> 1.3.1)
+    columnize (0.8.9)
     debugger-linecache (1.2.0)
-    debugger-ruby_core_source (1.3.1)
     diff-lcs (1.2.5)
     method_source (0.8.2)
-    pry (0.9.12.6)
-      coderay (~> 1.0)
-      method_source (~> 0.8)
+    multi_json (1.10.1)
+    pg (0.17.1)
+    pry (0.10.1)
+      coderay (~> 1.1.0)
+      method_source (~> 0.8.1)
       slop (~> 3.4)
-    pry-debugger (0.2.2)
-      debugger (~> 1.3)
-      pry (~> 0.9.10)
+    pry-byebug (2.0.0)
+      byebug (~> 3.4)
+      pry (~> 0.10)
+    rack (1.5.2)
+    rack-protection (1.5.3)
+      rack
+    rack-test (0.6.2)
+      rack (>= 1.0)
     rspec (2.14.1)
       rspec-core (~> 2.14.0)
       rspec-expectations (~> 2.14.0)
       rspec-mocks (~> 2.14.0)
-    rspec-core (2.14.7)
+    rspec-core (2.14.8)
     rspec-expectations (2.14.5)
       diff-lcs (>= 1.1.3, < 2.0)
-    rspec-mocks (2.14.5)
-    slop (3.4.7)
+    rspec-mocks (2.14.6)
+    sinatra (1.4.5)
+      rack (~> 1.4)
+      rack-protection (~> 1.4)
+      tilt (~> 1.3, >= 1.3.4)
+    sinatra-contrib (1.4.2)
+      backports (>= 2.0)
+      multi_json
+      rack-protection
+      rack-test
+      sinatra (~> 1.4.0)
+      tilt (~> 1.3)
+    sinatra-reloader (1.0)
+      sinatra-contrib
+    slop (3.6.0)
+    tilt (1.4.1)
 
 PLATFORMS
   ruby
 
 DEPENDENCIES
-  pry-debugger (~> 0.2.2)
-  rspec (~> 2.14.0)
+  pg
+  pry-byebug
+  rspec (~> 2.14.1)
+  sinatra (~> 1.4.5)
+  sinatra-reloader
diff --git a/lib/library_plus.rb b/lib/library_plus.rb
new file mode 100644
index 00000000..0ce23e58
--- /dev/null
+++ b/lib/library_plus.rb
@@ -0,0 +1,51 @@
+require 'pg'
+
+module Library
+  def self.create_db_connection(dbname)
+    PG.connect(host: 'localhost', dbname: dbname)
+  end
+
+  def self.clear_db(db)
+    db.exec <<-SQL
+      DELETE FROM users;
+      DELETE FROM books;
+      DELETE FROM checkouts;
+      /* TODO: Clear rest of the tables (books, etc.) */
+    SQL
+  end
+
+  def self.create_tables(db)
+    db.exec <<-SQL
+      CREATE TABLE IF NOT EXISTS users(
+        id SERIAL PRIMARY KEY,
+        name VARCHAR
+      );
+      CREATE TABLE IF NOT EXISTS books(
+        id SERIAL PRIMARY KEY,
+        title VARCHAR,
+        author VARCHAR,
+        status VARCHAR DEFAULT ('available')
+        );
+      CREATE TABLE IF NOT EXISTS checkouts(
+        id SERIAL PRIMARY KEY,
+        user_id INTEGER,
+        book_id INTEGER,
+        status VARCHAR DEFAULT ('checked_out'),
+        created_at TIMESTAMP without time zone DEFAULT NOW());
+      /* TODO: Create rest of the tables (books, etc.) */
+    SQL
+
+  end
+
+  def self.drop_tables(db)
+    db.exec <<-SQL
+      DROP TABLE users;
+      DROP TABLE books;
+      DROP TABLE checkouts;
+      /* TODO: Drop rest of the tables (books, etc.) */
+    SQL
+  end
+end
+
+require_relative 'library_plus/book_repo'
+require_relative 'library_plus/user_repo'
diff --git a/lib/library_plus/book_repo.rb b/lib/library_plus/book_repo.rb
new file mode 100644
index 00000000..0a84e82c
--- /dev/null
+++ b/lib/library_plus/book_repo.rb
@@ -0,0 +1,86 @@
+module Library
+  class BookRepo
+
+    def self.all(db)
+      db.exec("SELECT * FROM books;").to_a
+    end
+
+    def self.save(db, book_data)
+      if book_data['id']
+        sql = %q[UPDATE books 
+          SET title = $1 AND SET author = $2 
+          WHERE id = $3 
+          RETURNING *;
+        ]
+        result = db.exec(sql, [book_data['title'], book_data['author'], book_data['id']])
+      else 
+        sql = %q[INSERT INTO books (title, author) 
+          VALUES ($1, $2) 
+          RETURNING *;
+        ]
+        result = db.exec(sql, [book_data['title'], book_data['author']])
+      end
+      result.first
+    end
+
+    def self.status(db, book_id)
+      sql = %q[UPDATE books 
+          SET status = $1
+          WHERE id = $2 
+          RETURNING *;
+        ]
+      book = self.find(db, book_id)
+      if book['status'] == 'available'
+        result = db.exec(sql, ['checked_out', book_id])
+      else 
+        result = db.exec(sql, ['available', book_id])
+      end
+      result.first  
+    end
+
+    def self.find(db, book_id)
+      result = db.exec("SELECT * FROM books WHERE id = $1;", [book_id])
+      result.first
+    end
+
+    def self.destroy(db, book_id)
+      db.exec("DELETE FROM books WHERE id = $1;", [book_id])
+    end
+
+    def self.check_out_book(db, user_id, book_id)
+      sql = %q[INSERT INTO checkouts (user_id, book_id) 
+          VALUES ($1, $2) 
+          RETURNING *;
+          ]
+      result = db.exec(sql, [user_id, book_id])
+      result.first
+    end
+
+    def self.check_in_book(db, book_id)
+      sql = %q[UPDATE checkouts 
+        SET status = 'available'
+        WHERE book_id = $1
+        RETURNING *;
+      ]
+      result = db.exec(sql, [book_id])
+      result.first
+    end
+
+    def self.check_out_history_book(db, book_id)
+      sql = %q[SELECT * from checkouts
+        WHERE book_id = $1
+        ORDER By created_at;
+      ]
+      result = db.exec(sql, [book_id])
+    end
+
+    def self.check_out_history_user(db, user_id)
+      sql = %q[SELECT * from checkouts
+        WHERE user_id = $1
+        ORDER BY created_at;
+      ]
+      result = db.exec(sql, [book_id])
+    end
+
+  end
+end
\ No newline at end of file
diff --git a/lib/library_plus/user_repo.rb b/lib/library_plus/user_repo.rb
new file mode 100644
index 00000000..1c8616dd
--- /dev/null
+++ b/lib/library_plus/user_repo.rb
@@ -0,0 +1,35 @@
+module Library
+  class UserRepo
+
+    def self.all(db)
+      # Other code should not have to deal with the PG:Result.
+      # Therefore, convert the results into a plain array.
+      db.exec("SELECT * FROM users").to_a
+    end
+
+    def self.find(db, user_id)
+      result = db.exec("SELECT * FROM users WHERE id = $1;", [user_id])
+      result.first
+      # TODO: Insert SQL statement
+    end
+
+    def self.save(db, user_data)
+      if user_data['id']
+        result = db.exec("UPDATE users SET name = $1 WHERE id = $2 RETURNING *;",[user_data['name'], user_data['id']])
+        # TODO: Update SQL statement
+      else
+        result = db.exec("INSERT INTO users (name) VALUES ($1) RETURNING *;", [user_data['name']])
+        # TODO: Insert SQL statement
+      end
+      result.first
+
+    end
+
+    def self.destroy(db, user_id)
+      db.exec("DELETE FROM users WHERE id = $1;", [user_id])
+
+      # TODO: Delete SQL statement
+    end
+
+  end
+end
\ No newline at end of file
diff --git a/server.rb b/server.rb
new file mode 100644
index 00000000..71532d3f
--- /dev/null
+++ b/server.rb
@@ -0,0 +1,83 @@
+require 'sinatra'
+require 'sinatra/reloader'
+require './lib/library_plus'
+
+set :bind, '0.0.0.0' # This is needed for Vagrant
+
+get '/' do
+  erb :index
+end
+
+get '/users' do 
+  db = Library.create_db_connection('library_dev')
+  @users = Library::UserRepo.all(db)
+  erb :"users/index"
+end
+
+post '/users' do 
+  db = Library.create_db_connection('library_dev')
+  if params['user_name']
+    user = {'name' => params["user_name"]}
+    Library::UserRepo.save(db, user)
+  elsif params['user_id']
+    id = params["user_id"]
+    Library::UserRepo.destroy(db, id)
+  end
+  redirect to('/users')
+end
+
+get '/users/:id' do
+  id = params['id']
+  db = Library.create_db_connection('library_dev')
+  @user = Library::UserRepo.find(db, id)
+  erb :"users/show"
+end
+
+get '/books' do
+  db = Library.create_db_connection('library_dev')
+  @books = Library::BookRepo.all(db)
+  erb :"books/index"
+end
+
+post '/books' do 
+  db = Library.create_db_connection('library_dev')
+  puts params
+  if params['book_title'] && params['book_author']
+    user = {'title' => params['book_title'], 'author' => params['book_author']}
+    Library::BookRepo.save(db, user)
+  elsif params['book_id']
+    id = params["book_id"]
+    Library::BookRepo.destroy(db, id)
+  end
+  redirect to('/books')
+end
+
+get '/books/:id' do
+  id = params['id']
+  db = Library.create_db_connection('library_dev')
+  @book = Library::BookRepo.find(db, id)
+  @users = Library::UserRepo.all(db)
+  @history = Library::BookRepo.check_out_history_book(db, params['id'])
+  erb :"books/show"
+end
+
+post '/books/:id/checkout' do 
+  db = Library.create_db_connection('library_dev')
+  Library::BookRepo.check_out_book(db, params['user_id'], params['id'])
+  Library::BookRepo.status(db, params['id'])
+  redirect to('/books/' + params['id'])
+end
+
+post '/books/:id/checkin' do 
+  db = Library.create_db_connection('library_dev')
+  Library::BookRepo.check_in_book(db, params['id'])
+  Library::BookRepo.status(db, params['id'])
+  redirect to('/books/' + params['id'])
+end
+
+# get '/books/:id/history' do
+#   puts params['id']
+#   db = Library.create_db_connection('library_dev')
+#   @history = Library::BookRepo.check_out_history_book(db, params['id'])
+#   erb :"books/show"
+# end
\ No newline at end of file
diff --git a/spec/.gitkeep b/spec/.gitkeep
deleted file mode 100644
index e69de29b..00000000
diff --git a/spec/repos/user_repo_spec.rb b/spec/repos/user_repo_spec.rb
new file mode 100644
index 00000000..d907dc5c
--- /dev/null
+++ b/spec/repos/user_repo_spec.rb
@@ -0,0 +1,65 @@
+require 'spec_helper'
+
+describe Library::UserRepo do
+
+  def user_count(db)
+    db.exec("SELECT COUNT(*) FROM users")[0]["count"].to_i
+  end
+
+  let(:db) { Library.create_db_connection('library_test') }
+
+  before(:each) do
+    Library.clear_db(db)
+  end
+
+  it "gets all users" do
+    db.exec("INSERT INTO users (name) VALUES ($1)", ["Alice"])
+    db.exec("INSERT INTO users (name) VALUES ($1)", ["Bob"])
+
+    users = Library::UserRepo.all(db)
+    expect(users).to be_a Array
+    expect(users.count).to eq 2
+
+    names = users.map {|u| u['name'] }
+    expect(names).to include "Alice", "Bob"
+  end
+
+  it "creates users" do
+    expect(user_count(db)).to eq 0
+
+    user = Library::UserRepo.save(db, { 'name' => "Alice" })
+    expect(user['id']).to_not be_nil
+    expect(user['name']).to eq "Alice"
+
+    # Check for persistence
+    expect(user_count(db)).to eq 1
+
+    user = db.exec("SELECT * FROM users")[0]
+    expect(user['name']).to eq "Alice"
+  end
+
+  it "finds users" do
+    user = Library::UserRepo.save(db, { 'name' => "Alice" })
+    retrieved_user = Library::UserRepo.find(db, user['id'])
+    expect(retrieved_user['name']).to eq "Alice"
+  end
+
+  it "updates users" do
+    user1 = Library::UserRepo.save(db, { 'name' => "Alice" })
+    user2 = Library::UserRepo.save(db, { 'id' => user1['id'], 'name' => "Alicia" })
+    expect(user2['id']).to eq(user1['id'])
+    expect(user2['name']).to eq "Alicia"
+
+    # Check for persistence
+    user3 = Library::UserRepo.find(db, user1['id'])
+    expect(user3['name']).to eq "Alicia"
+  end
+
+  it "destroys users" do
+    user = Library::UserRepo.save(db, { 'name' => "Alice" })
+    expect(user_count(db)).to eq 1
+
+    Library::UserRepo.destroy(db, user['id'])
+    expect(user_count(db)).to eq 0
+  end
+end
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
new file mode 100644
index 00000000..962938ee
--- /dev/null
+++ b/spec/spec_helper.rb
@@ -0,0 +1,13 @@
+require 'library_plus'
+
+RSpec.configure do |config|
+  config.treat_symbols_as_metadata_keys_with_true_values = true
+  config.run_all_when_everything_filtered = true
+  config.filter_run :focus
+
+  # Run specs in random order to surface order dependencies. If you find an
+  # order dependency and want to debug it, you can fix the order by providing
+  # the seed, which is printed after each run.
+  #     --seed 1234
+  config.order = 'random'
+end
diff --git a/views/index.erb b/views/index.erb
new file mode 100644
index 00000000..9c1f103a
--- /dev/null
+++ b/views/index.erb
@@ -0,0 +1,6 @@
+<h1>The Library Plus System</h1>
+
+<p>Welcome to your freedom!</p>
+
+<a href="/users">Manage Users!</a>
+<a href="/books">Manage Books!</a>
\ No newline at end of file