diff --git a/docs/en/Tutorials/Part-1.md b/docs/en/Tutorials/Part-1.md
index 6d59481bec..7de5e54c16 100644
--- a/docs/en/Tutorials/Part-1.md
+++ b/docs/en/Tutorials/Part-1.md
@@ -37,8 +37,9 @@ This tutorial is organized as the following parts;
 - [Part 3: Creating, updating and deleting books](Part-3.md)
 - [Part 4: Integration tests](Part-4.md)
 - [Part 5: Authorization](Part-5.md)
-- [Part 6: Author: Domain layer](Part-6.md)
-- [Part 7: Author: Database Integration](Part-7.md)
+- [Part 6: Authors: Domain layer](Part-6.md)
+- [Part 7: Authors: Database Integration](Part-7.md)
+- [Part 8: Authors: Application Layer](Part-8.md)
 
 ### Download the Source Code
 
diff --git a/docs/en/Tutorials/Part-2.md b/docs/en/Tutorials/Part-2.md
index 13725696c9..ec86bd1ac3 100644
--- a/docs/en/Tutorials/Part-2.md
+++ b/docs/en/Tutorials/Part-2.md
@@ -37,8 +37,9 @@ This tutorial is organized as the following parts;
 - [Part 3: Creating, updating and deleting books](Part-3.md)
 - [Part 4: Integration tests](Part-4.md)
 - [Part 5: Authorization](Part-5.md)
-- [Part 6: Author: Domain layer](Part-6.md)
-- [Part 7: Author: Database Integration](Part-7.md)
+- [Part 6: Authors: Domain layer](Part-6.md)
+- [Part 7: Authors: Database Integration](Part-7.md)
+- [Part 8: Authors: Application Layer](Part-8.md)
 
 ### Download the Source Code
 
diff --git a/docs/en/Tutorials/Part-3.md b/docs/en/Tutorials/Part-3.md
index 09ebcba338..16edf047e9 100644
--- a/docs/en/Tutorials/Part-3.md
+++ b/docs/en/Tutorials/Part-3.md
@@ -37,8 +37,9 @@ This tutorial is organized as the following parts;
 - **Part 3: Creating, updating and deleting books (this part)**
 - [Part 4: Integration tests](Part-4.md)
 - [Part 5: Authorization](Part-5.md)
-- [Part 6: Author: Domain layer](Part-6.md)
-- [Part 7: Author: Database Integration](Part-7.md)
+- [Part 6: Authors: Domain layer](Part-6.md)
+- [Part 7: Authors: Database Integration](Part-7.md)
+- [Part 8: Authors: Application Layer](Part-8.md)
 
 ### Download the Source Code
 
diff --git a/docs/en/Tutorials/Part-4.md b/docs/en/Tutorials/Part-4.md
index 0dd34621aa..4cf2628c58 100644
--- a/docs/en/Tutorials/Part-4.md
+++ b/docs/en/Tutorials/Part-4.md
@@ -37,8 +37,9 @@ This tutorial is organized as the following parts;
 - [Part 3: Creating, updating and deleting books](Part-3.md)
 - **Part 4: Integration tests (this part)**
 - [Part 5: Authorization](Part-5.md)
-- [Part 6: Author: Domain layer](Part-6.md)
-- [Part 7: Author: Database Integration](Part-7.md)
+- [Part 6: Authors: Domain layer](Part-6.md)
+- [Part 7: Authors: Database Integration](Part-7.md)
+- [Part 8: Authors: Application Layer](Part-8.md)
 
 ### Download the Source Code
 
diff --git a/docs/en/Tutorials/Part-5.md b/docs/en/Tutorials/Part-5.md
index 803bad1492..4094640cc2 100644
--- a/docs/en/Tutorials/Part-5.md
+++ b/docs/en/Tutorials/Part-5.md
@@ -37,8 +37,9 @@ This tutorial is organized as the following parts;
 - [Part 3: Creating, updating and deleting books](Part-3.md)
 - [Part 4: Integration tests](Part-4.md)
 - **Part 5: Authorization (this part)**
-- [Part 6: Author: Domain layer](Part-6.md)
-- [Part 7: Author: Database Integration](Part-7.md)
+- [Part 6: Authors: Domain layer](Part-6.md)
+- [Part 7: Authors: Database Integration](Part-7.md)
+- [Part 8: Authors: Application Layer](Part-8.md)
 
 ### Download the Source Code
 
diff --git a/docs/en/Tutorials/Part-6.md b/docs/en/Tutorials/Part-6.md
index 8b97ac63fc..e62bf03391 100644
--- a/docs/en/Tutorials/Part-6.md
+++ b/docs/en/Tutorials/Part-6.md
@@ -37,8 +37,9 @@ This tutorial is organized as the following parts;
 - [Part 3: Creating, updating and deleting books](Part-3.md)
 - [Part 4: Integration tests](Part-4.md)
 - [Part 5: Authorization](Part-5.md)
-- **Part 6: Author: Domain layer (this part)**
-- [Part 7: Author: Database Integration](Part-7.md)
+- **Part 6: Authors: Domain layer (this part)**
+- [Part 7: Authors: Database Integration](Part-7.md)
+- [Part 8: Authors: Application Layer](Part-8.md)
 
 ### Download the Source Code
 
diff --git a/docs/en/Tutorials/Part-7.md b/docs/en/Tutorials/Part-7.md
index fb69894e97..d925eb5e17 100644
--- a/docs/en/Tutorials/Part-7.md
+++ b/docs/en/Tutorials/Part-7.md
@@ -37,8 +37,9 @@ This tutorial is organized as the following parts;
 - [Part 3: Creating, updating and deleting books](Part-3.md)
 - [Part 4: Integration tests](Part-4.md)
 - [Part 5: Authorization](Part-5.md)
-- [Part 6: Author: Domain layer](Part-6.md)
-- **Part 7: Author: Database Integration (this part)**
+- [Part 6: Authors: Domain layer](Part-6.md)
+- **Part 7: Authors: Database Integration (this part)**
+- [Part 8: Authors: Application Layer](Part-8.md)
 
 ### Download the Source Code
 
@@ -49,7 +50,7 @@ This tutorials has multiple versions based on your **UI** and **Database** prefe
 
 ## Introduction
 
-This part explains to configure the database integration for the `Author` entity introduced in the previous part.
+This part explains how to configure the database integration for the `Author` entity introduced in the previous part.
 
 ## DB Context
 
diff --git a/docs/en/Tutorials/Part-8.md b/docs/en/Tutorials/Part-8.md
new file mode 100644
index 0000000000..1845cefd7e
--- /dev/null
+++ b/docs/en/Tutorials/Part-8.md
@@ -0,0 +1,57 @@
+# Web Application Development Tutorial - Part 8: Authors: Application Layer
+````json
+//[doc-params]
+{
+    "UI": ["MVC","NG"],
+    "DB": ["EF","Mongo"]
+}
+````
+{{
+if UI == "MVC"
+  UI_Text="mvc"
+else if UI == "NG"
+  UI_Text="angular"
+else
+  UI_Text="?"
+end
+if DB == "EF"
+  DB_Text="Entity Framework Core"
+else if DB == "Mongo"
+  DB_Text="MongoDB"
+else
+  DB_Text="?"
+end
+}}
+
+## About This Tutorial
+
+In this tutorial series, you will build an ABP based web application named `Acme.BookStore`. This application is used to manage a list of books and their authors. It is developed using the following technologies:
+
+* **{{DB_Text}}** as the ORM provider. 
+* **{{UI_Value}}** as the UI Framework.
+
+This tutorial is organized as the following parts;
+
+- [Part 1: Creating the server side](Part-1.md)
+- [Part 2: The book list page](Part-2.md)
+- [Part 3: Creating, updating and deleting books](Part-3.md)
+- [Part 4: Integration tests](Part-4.md)
+- [Part 5: Authorization](Part-5.md)
+- [Part 6: Authors: Domain layer](Part-6.md)
+- [Part 7: Authors: Database Integration](Part-7.md)
+- **Part 8: Author: Application Layer (this part)**
+
+### Download the Source Code
+
+This tutorials has multiple versions based on your **UI** and **Database** preferences. We've prepared two combinations of the source code to be downloaded:
+
+* [MVC (Razor Pages) UI with EF Core](https://github.com/abpframework/abp-samples/tree/master/BookStore-Mvc-EfCore)
+* [Angular UI with MongoDB](https://github.com/abpframework/abp-samples/tree/master/BookStore-Angular-MongoDb)
+
+## Introduction
+
+This part explains to create an application layer for the `Author` entity created before.
+
+## Application Service
+
+TODO
\ No newline at end of file