diff --git a/Gemfile b/Gemfile
index 205079f..b4fd75b 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,12 +1,13 @@
 source 'https://rubygems.org'
 git_source(:github) { |repo| "https://github.com/#{repo}.git" }
 
-ruby '2.4.1'
+ruby '3.1.0'
 
 # Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
-gem 'rails', '~> 5.2.5'
+gem 'rails', '~> 6.1'
 # Use sqlite3 as the database for Active Record
-gem 'sqlite3'
+gem 'sqlite3', group: :development
+gem 'pg', group: :production
 # Use Puma as the app server
 gem 'puma', '~> 3.11'
 # Use SCSS for stylesheets
@@ -56,4 +57,4 @@ gem "graphiql-rails"
 # Windows does not include zoneinfo files, so bundle the tzinfo-data gem
 gem 'tzinfo-data', platforms: [:mingw, :mswin, :x64_mingw, :jruby]
 
-gem 'graphiql-rails', group: :development
\ No newline at end of file
+gem 'graphiql-rails', group: :development
diff --git a/Gemfile.lock b/Gemfile.lock
index 4bfa01c..51834e6 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,51 +1,68 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    actioncable (5.2.5)
-      actionpack (= 5.2.5)
+    actioncable (6.1.6.1)
+      actionpack (= 6.1.6.1)
+      activesupport (= 6.1.6.1)
       nio4r (~> 2.0)
       websocket-driver (>= 0.6.1)
-    actionmailer (5.2.5)
-      actionpack (= 5.2.5)
-      actionview (= 5.2.5)
-      activejob (= 5.2.5)
+    actionmailbox (6.1.6.1)
+      actionpack (= 6.1.6.1)
+      activejob (= 6.1.6.1)
+      activerecord (= 6.1.6.1)
+      activestorage (= 6.1.6.1)
+      activesupport (= 6.1.6.1)
+      mail (>= 2.7.1)
+    actionmailer (6.1.6.1)
+      actionpack (= 6.1.6.1)
+      actionview (= 6.1.6.1)
+      activejob (= 6.1.6.1)
+      activesupport (= 6.1.6.1)
       mail (~> 2.5, >= 2.5.4)
       rails-dom-testing (~> 2.0)
-    actionpack (5.2.5)
-      actionview (= 5.2.5)
-      activesupport (= 5.2.5)
-      rack (~> 2.0, >= 2.0.8)
+    actionpack (6.1.6.1)
+      actionview (= 6.1.6.1)
+      activesupport (= 6.1.6.1)
+      rack (~> 2.0, >= 2.0.9)
       rack-test (>= 0.6.3)
       rails-dom-testing (~> 2.0)
-      rails-html-sanitizer (~> 1.0, >= 1.0.2)
-    actionview (5.2.5)
-      activesupport (= 5.2.5)
+      rails-html-sanitizer (~> 1.0, >= 1.2.0)
+    actiontext (6.1.6.1)
+      actionpack (= 6.1.6.1)
+      activerecord (= 6.1.6.1)
+      activestorage (= 6.1.6.1)
+      activesupport (= 6.1.6.1)
+      nokogiri (>= 1.8.5)
+    actionview (6.1.6.1)
+      activesupport (= 6.1.6.1)
       builder (~> 3.1)
       erubi (~> 1.4)
       rails-dom-testing (~> 2.0)
-      rails-html-sanitizer (~> 1.0, >= 1.0.3)
-    activejob (5.2.5)
-      activesupport (= 5.2.5)
+      rails-html-sanitizer (~> 1.1, >= 1.2.0)
+    activejob (6.1.6.1)
+      activesupport (= 6.1.6.1)
       globalid (>= 0.3.6)
-    activemodel (5.2.5)
-      activesupport (= 5.2.5)
-    activerecord (5.2.5)
-      activemodel (= 5.2.5)
-      activesupport (= 5.2.5)
-      arel (>= 9.0)
-    activestorage (5.2.5)
-      actionpack (= 5.2.5)
-      activerecord (= 5.2.5)
-      marcel (~> 1.0.0)
-    activesupport (5.2.5)
+    activemodel (6.1.6.1)
+      activesupport (= 6.1.6.1)
+    activerecord (6.1.6.1)
+      activemodel (= 6.1.6.1)
+      activesupport (= 6.1.6.1)
+    activestorage (6.1.6.1)
+      actionpack (= 6.1.6.1)
+      activejob (= 6.1.6.1)
+      activerecord (= 6.1.6.1)
+      activesupport (= 6.1.6.1)
+      marcel (~> 1.0)
+      mini_mime (>= 1.1.0)
+    activesupport (6.1.6.1)
       concurrent-ruby (~> 1.0, >= 1.0.2)
-      i18n (>= 0.7, < 2)
-      minitest (~> 5.1)
-      tzinfo (~> 1.1)
-    arel (9.0.0)
+      i18n (>= 1.6, < 2)
+      minitest (>= 5.1)
+      tzinfo (~> 2.0)
+      zeitwerk (~> 2.3)
     bindex (0.8.1)
-    bootsnap (1.7.3)
-      msgpack (~> 1.0)
+    bootsnap (1.12.0)
+      msgpack (~> 1.2)
     builder (3.2.4)
     byebug (11.1.3)
     coffee-rails (4.2.2)
@@ -55,74 +72,78 @@ GEM
       coffee-script-source
       execjs
     coffee-script-source (1.12.2)
-    concurrent-ruby (1.1.8)
+    concurrent-ruby (1.1.10)
     crass (1.0.6)
     erubi (1.10.0)
-    execjs (2.7.0)
-    faker (2.12.0)
-      i18n (>= 1.6, < 2)
-    ffi (1.15.0)
-    globalid (0.4.2)
-      activesupport (>= 4.2.0)
-    graphiql-rails (1.7.0)
+    execjs (2.8.1)
+    faker (2.21.0)
+      i18n (>= 1.8.11, < 2)
+    ffi (1.15.5)
+    globalid (1.0.0)
+      activesupport (>= 5.0)
+    graphiql-rails (1.8.0)
       railties
       sprockets-rails
-    graphql (1.9.19)
-    i18n (1.8.10)
+    graphql (2.0.11)
+    i18n (1.12.0)
       concurrent-ruby (~> 1.0)
-    jbuilder (2.11.2)
+    jbuilder (2.11.5)
+      actionview (>= 5.0.0)
       activesupport (>= 5.0.0)
-    listen (3.1.5)
+    listen (3.0.8)
       rb-fsevent (~> 0.9, >= 0.9.4)
       rb-inotify (~> 0.9, >= 0.9.7)
-      ruby_dep (~> 1.2)
-    loofah (2.9.1)
+    loofah (2.18.0)
       crass (~> 1.0.2)
       nokogiri (>= 1.5.9)
     mail (2.7.1)
       mini_mime (>= 0.1.1)
-    marcel (1.0.1)
+    marcel (1.0.2)
     method_source (1.0.0)
-    mini_mime (1.1.0)
-    mini_portile2 (2.4.0)
-    minitest (5.14.4)
-    msgpack (1.4.2)
-    nio4r (2.5.7)
-    nokogiri (1.10.10)
-      mini_portile2 (~> 2.4.0)
+    mini_mime (1.1.2)
+    mini_portile2 (2.8.0)
+    minitest (5.16.2)
+    msgpack (1.5.3)
+    nio4r (2.5.8)
+    nokogiri (1.13.7)
+      mini_portile2 (~> 2.8.0)
+      racc (~> 1.4)
+    pg (1.4.1)
     puma (3.12.6)
-    rack (2.2.3)
-    rack-test (1.1.0)
-      rack (>= 1.0, < 3)
-    rails (5.2.5)
-      actioncable (= 5.2.5)
-      actionmailer (= 5.2.5)
-      actionpack (= 5.2.5)
-      actionview (= 5.2.5)
-      activejob (= 5.2.5)
-      activemodel (= 5.2.5)
-      activerecord (= 5.2.5)
-      activestorage (= 5.2.5)
-      activesupport (= 5.2.5)
-      bundler (>= 1.3.0)
-      railties (= 5.2.5)
+    racc (1.6.0)
+    rack (2.2.4)
+    rack-test (2.0.2)
+      rack (>= 1.3)
+    rails (6.1.6.1)
+      actioncable (= 6.1.6.1)
+      actionmailbox (= 6.1.6.1)
+      actionmailer (= 6.1.6.1)
+      actionpack (= 6.1.6.1)
+      actiontext (= 6.1.6.1)
+      actionview (= 6.1.6.1)
+      activejob (= 6.1.6.1)
+      activemodel (= 6.1.6.1)
+      activerecord (= 6.1.6.1)
+      activestorage (= 6.1.6.1)
+      activesupport (= 6.1.6.1)
+      bundler (>= 1.15.0)
+      railties (= 6.1.6.1)
       sprockets-rails (>= 2.0.0)
     rails-dom-testing (2.0.3)
       activesupport (>= 4.2.0)
       nokogiri (>= 1.6)
-    rails-html-sanitizer (1.3.0)
+    rails-html-sanitizer (1.4.3)
       loofah (~> 2.3)
-    railties (5.2.5)
-      actionpack (= 5.2.5)
-      activesupport (= 5.2.5)
+    railties (6.1.6.1)
+      actionpack (= 6.1.6.1)
+      activesupport (= 6.1.6.1)
       method_source
-      rake (>= 0.8.7)
-      thor (>= 0.19.0, < 2.0)
-    rake (13.0.3)
-    rb-fsevent (0.10.4)
+      rake (>= 12.2)
+      thor (~> 1.0)
+    rake (13.0.6)
+    rb-fsevent (0.11.1)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
-    ruby_dep (1.5.0)
     sass (3.7.4)
       sass-listen (~> 4.0.0)
     sass-listen (4.0.0)
@@ -141,32 +162,32 @@ GEM
     sprockets (3.7.2)
       concurrent-ruby (~> 1.0)
       rack (> 1, < 3)
-    sprockets-rails (3.2.2)
-      actionpack (>= 4.0)
-      activesupport (>= 4.0)
+    sprockets-rails (3.4.2)
+      actionpack (>= 5.2)
+      activesupport (>= 5.2)
       sprockets (>= 3.0.0)
-    sqlite3 (1.4.2)
-    thor (1.1.0)
-    thread_safe (0.3.6)
+    sqlite3 (1.4.4)
+    thor (1.2.1)
     tilt (2.0.10)
     turbolinks (5.2.1)
       turbolinks-source (~> 5.2)
     turbolinks-source (5.2.0)
-    tzinfo (1.2.9)
-      thread_safe (~> 0.1)
+    tzinfo (2.0.4)
+      concurrent-ruby (~> 1.0)
     uglifier (4.2.0)
       execjs (>= 0.3.0, < 3)
-    web-console (3.7.0)
-      actionview (>= 5.0)
-      activemodel (>= 5.0)
+    web-console (4.2.0)
+      actionview (>= 6.0.0)
+      activemodel (>= 6.0.0)
       bindex (>= 0.4.0)
-      railties (>= 5.0)
-    websocket-driver (0.7.3)
+      railties (>= 6.0.0)
+    websocket-driver (0.7.5)
       websocket-extensions (>= 0.1.0)
     websocket-extensions (0.1.5)
+    zeitwerk (2.6.0)
 
 PLATFORMS
-  x86_64-darwin-19
+  ruby
 
 DEPENDENCIES
   bootsnap (>= 1.1.0)
@@ -177,8 +198,9 @@ DEPENDENCIES
   graphql
   jbuilder (~> 2.5)
   listen (>= 3.0.5, < 3.2)
+  pg
   puma (~> 3.11)
-  rails (~> 5.2.5)
+  rails (~> 6.1)
   sass-rails (~> 5.0)
   spring
   spring-watcher-listen (~> 2.0.0)
@@ -189,7 +211,7 @@ DEPENDENCIES
   web-console (>= 3.3.0)
 
 RUBY VERSION
-   ruby 2.4.1p111
+   ruby 3.1.0p0
 
 BUNDLED WITH
-   2.2.9
+   2.1.2
diff --git a/app/graphql/mutations/update_author.rb b/app/graphql/mutations/update_author.rb
index 575faad..caa053d 100644
--- a/app/graphql/mutations/update_author.rb
+++ b/app/graphql/mutations/update_author.rb
@@ -2,14 +2,15 @@ class Mutations::UpdateAuthor < Mutations::BaseMutation
   description "Updates Author"
 
   argument :name, String, required: true
+  argument :email, String, required: true
   argument :id, ID, required: true
 
   field :author, Types::AuthorType, null: false
   field :errors, [String], null: false
 
-  def resolve(name:, id:)
+  def resolve(name:, id:, email:)
     author = Author.find(id)
-    author.update_attributes(name: name)
+    author.update(name: name, email: email)
 
     if(author.errors.blank?)
       {author: author, errors: []}
diff --git a/app/graphql/types/query_type.rb b/app/graphql/types/query_type.rb
index 6fb43de..093375f 100644
--- a/app/graphql/types/query_type.rb
+++ b/app/graphql/types/query_type.rb
@@ -16,5 +16,21 @@ def authors
     def author(id:)
       Author.find(id)
     end
+
+    # /books
+    field :books, [Types::BookType], null: true
+
+    def books
+      Book.all
+    end
+
+    # /book/:id
+    field :book, Types::BookType, null: false do
+      argument :id, ID, required: true
+    end
+
+    def book(id:)
+      Book.find(id)
+    end
   end
 end