diff --git a/.gitignore b/.gitignore
index 2f761fe..ab69669 100644
--- a/.gitignore
+++ b/.gitignore
@@ -41,3 +41,6 @@ coverage
 config/settings.local.yml
 config/settings/*.local.yml
 config/environments/*.local.yml
+
+.idea
+.byebug_history
diff --git a/Gemfile b/Gemfile
index fc76bca..1d32d3a 100644
--- a/Gemfile
+++ b/Gemfile
@@ -29,6 +29,12 @@ gem 'activeadmin'
 gem 'activeadmin_addons'
 gem 'devise'
 
+# Сериализация данных
+gem 'alba'
+
+# Пагинация
+gem 'kaminari'
+
 group :development, :test do
   gem 'bundler-audit'
   gem 'capybara'
diff --git a/Gemfile.lock b/Gemfile.lock
index 63e5241..28c5656 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -95,6 +95,8 @@ GEM
       uri (>= 0.13.1)
     addressable (2.8.7)
       public_suffix (>= 2.0.2, < 7.0)
+    alba (3.5.0)
+      ostruct (~> 0.6)
     arbre (1.7.0)
       activesupport (>= 3.0.0)
       ruby2_keywords (>= 0.0.2)
@@ -448,6 +450,7 @@ DEPENDENCIES
   activeadmin
   activeadmin_addons
   activerecord-import
+  alba
   bundler-audit
   capybara
   config
@@ -460,6 +463,7 @@ DEPENDENCIES
   factory_bot_rails
   fasterer
   ffaker
+  kaminari
   parallel
   pg
   pry-byebug
diff --git a/app/controllers/books_controller.rb b/app/controllers/books_controller.rb
new file mode 100644
index 0000000..947e073
--- /dev/null
+++ b/app/controllers/books_controller.rb
@@ -0,0 +1,7 @@
+class BooksController < ApplicationController
+  def index
+    @books = Book.all.page(params[:page])
+
+    render json: BookSerializer.new(@books).serialize
+  end
+end
diff --git a/app/serializers/author_serializer.rb b/app/serializers/author_serializer.rb
new file mode 100644
index 0000000..77561f2
--- /dev/null
+++ b/app/serializers/author_serializer.rb
@@ -0,0 +1,11 @@
+class AuthorSerializer
+  include Alba::Resource
+
+  attributes :id, :full_name
+
+  private
+
+  def full_name(author)
+    author.slice(:first_name, :middle_name, :last_name).values.join(' ')
+  end
+end
diff --git a/app/serializers/book_serializer.rb b/app/serializers/book_serializer.rb
new file mode 100644
index 0000000..5a74db9
--- /dev/null
+++ b/app/serializers/book_serializer.rb
@@ -0,0 +1,10 @@
+class BookSerializer
+  include Alba::Resource
+
+  root_key :books
+
+  attributes :id, :title, :insno, :libid
+
+  many :authors
+  one :language
+end
diff --git a/app/serializers/language_serializer.rb b/app/serializers/language_serializer.rb
new file mode 100644
index 0000000..1511be9
--- /dev/null
+++ b/app/serializers/language_serializer.rb
@@ -0,0 +1,5 @@
+class LanguageSerializer
+  include Alba::Resource
+
+  attributes :id, :slug, :name
+end
diff --git a/config/database.yml b/config/database.yml
index 48f30ee..a8e84e1 100644
--- a/config/database.yml
+++ b/config/database.yml
@@ -7,8 +7,8 @@ default: &default
 postgre: &postgre
   host: <%= ENV.fetch('POSTGRES_HOST', 'localhost') %>
   port: <%= ENV.fetch('POSTGRES_PORT', '5432') %>
-  username: <%= ENV.fetch('POSTGRES_USER') { 'igorsimdyanov' } %>
-  password: <%= ENV.fetch('POSTGRES_PASSWORD') { '' } %>
+  username: <%= ENV.fetch('POSTGRES_USER') { 'postgres' } %>
+  password: <%= ENV.fetch('POSTGRES_PASSWORD') { 'postgres' } %>
 
 development:
   <<: *default
diff --git a/config/initializers/kaminari_config.rb b/config/initializers/kaminari_config.rb
new file mode 100644
index 0000000..ffd57da
--- /dev/null
+++ b/config/initializers/kaminari_config.rb
@@ -0,0 +1,14 @@
+# frozen_string_literal: true
+
+Kaminari.configure do |config|
+  config.default_per_page = Settings.app.items_per_page
+  # config.max_per_page = nil
+  # config.window = 4
+  # config.outer_window = 0
+  # config.left = 0
+  # config.right = 0
+  # config.page_method_name = :page
+  # config.param_name = :page
+  # config.max_pages = nil
+  # config.params_on_first_page = false
+end
diff --git a/config/routes.rb b/config/routes.rb
index ae608d2..e02068c 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -20,6 +20,8 @@
   #   # end
   # end
 
+  get 'books(/:page)', to: 'books#index'
+
   # Reveal health status on /up that returns 200 if the app boots with no exceptions, otherwise 500.
   # Can be used by load balancers and uptime monitors to verify that the app is live.
   get 'up' => 'rails/health#show', as: :rails_health_check
diff --git a/docs/rails_layers.puml b/docs/rails_layers.puml
new file mode 100644
index 0000000..32689a7
--- /dev/null
+++ b/docs/rails_layers.puml
@@ -0,0 +1,21 @@
+@startuml
+
+actor User
+
+participant "Router" as Routing
+participant "Controller" as Controller
+participant "Model" as Model
+participant "Business Logic" as BusinessLogic
+participant "Serializer" as Serializer
+
+User -> Routing: HTTP Request
+Routing -> Controller: Routes to Controller
+Controller -> BusinessLogic: Some Business Logic
+BusinessLogic -> Model: Query
+Model -> BusinessLogic: Records
+BusinessLogic -> Controller: Processed Data
+Controller -> Serializer: Serialize
+Serializer -> Controller: Serialized Data
+Controller -> User: HTTP Response
+
+@enduml
diff --git a/spec/controllers/books_controller_spec.rb b/spec/controllers/books_controller_spec.rb
new file mode 100644
index 0000000..2fd5b3b
--- /dev/null
+++ b/spec/controllers/books_controller_spec.rb
@@ -0,0 +1,42 @@
+require 'rails_helper'
+
+RSpec.describe BooksController, type: :controller do
+  describe 'GET #index' do
+    let(:language) { create(:language) }
+    let(:folder) { create(:folder) }
+    let!(:books) { create_list(:book, 21, folder:, language:) }
+
+    before do
+      get :index
+    end
+
+    it 'returns a successful response' do
+      expect(response).to have_http_status(:success)
+    end
+
+    it 'returns JSON with all books' do
+      json_response = JSON.parse(response.body)
+
+      expect(json_response.size).to eq(20)
+
+      json_response.each_with_index do |book_json, index|
+        expect(book_json['id']).to eq(books[index].id)
+        expect(book_json['title']).to eq(books[index].title)
+        expect(book_json['insno']).to eq(books[index].insno)
+        expect(book_json['libid']).to eq(books[index].libid)
+      end
+    end
+
+    context 'with pagination' do
+      before do
+        get :index, params: { page: 2 }
+      end
+
+      it 'returns only the first page of books' do
+        json_response = JSON.parse(response.body)
+
+        expect(json_response.size).to eq(books[20..].size)
+      end
+    end
+  end
+end
diff --git a/spec/factories/books.rb b/spec/factories/books.rb
index f6717e5..709fc73 100644
--- a/spec/factories/books.rb
+++ b/spec/factories/books.rb
@@ -1,6 +1,7 @@
 FactoryBot.define do
   factory :book do
     title { FFaker::Book.title }
+    insno { FFaker::Book.isbn }
     libid { 3064 }
     size { 9836 }
     filename { 3064 }
diff --git a/spec/serializers/author_serializer_spec.rb b/spec/serializers/author_serializer_spec.rb
new file mode 100644
index 0000000..7e25eeb
--- /dev/null
+++ b/spec/serializers/author_serializer_spec.rb
@@ -0,0 +1,17 @@
+RSpec.describe AuthorSerializer, type: :serializer do
+  let(:author) { create(:full_author) }
+
+  describe 'serialization' do
+    context 'when correct author is passed' do
+      subject { described_class.new(author) }
+
+      it "return correct json response" do
+        serialized = JSON.parse(subject.to_json)
+        full_name = [ author.first_name, author.middle_name, author.last_name ].join(' ')
+
+        expect(serialized['id']).to eq(author.id)
+        expect(serialized['full_name']).to eq(full_name)
+      end
+    end
+  end
+end
diff --git a/spec/serializers/book_serializer_spec.rb b/spec/serializers/book_serializer_spec.rb
new file mode 100644
index 0000000..8044f61
--- /dev/null
+++ b/spec/serializers/book_serializer_spec.rb
@@ -0,0 +1,21 @@
+RSpec.describe BookSerializer, type: :serializer do
+  let(:book) { create(:book_with_authors) }
+
+  describe 'serialization' do
+    context 'when correct book is passed' do
+      subject { described_class.new(book) }
+
+      it "return correct json response" do
+        serialized = JSON.parse(subject.to_json)
+
+        expect(serialized.dig('books', 'id')).to eq(book.id)
+        expect(serialized.dig('books', 'title')).to eq(book.title)
+        expect(serialized.dig('books', 'insno')).to eq(book.insno)
+        expect(serialized.dig('books', 'libid')).to eq(book.libid)
+        expect(serialized.dig('books', 'authors').size).to eq(book.authors.size)
+        expect(serialized.dig('books', 'language', 'id')).to eq(book.language.id)
+        expect(serialized.dig('books', 'language', 'name')).to eq(book.language.name)
+      end
+    end
+  end
+end
diff --git a/spec/serializers/language_serializer_spec.rb b/spec/serializers/language_serializer_spec.rb
new file mode 100644
index 0000000..ba3e959
--- /dev/null
+++ b/spec/serializers/language_serializer_spec.rb
@@ -0,0 +1,17 @@
+RSpec.describe LanguageSerializer, type: :serializer do
+  let(:language) { create(:language) }
+
+  describe 'serialization' do
+    context 'when correct language is passed' do
+      subject { described_class.new(language) }
+
+      it "return correct json response" do
+        serialized = JSON.parse(subject.to_json)
+
+        expect(serialized['id']).to eq(language.id)
+        expect(serialized['slug']).to eq(language.slug)
+        expect(serialized['name']).to eq(language.name)
+      end
+    end
+  end
+end