Added to tutorials index page

docs/en/tutorials/index.md

@@ -3,4 +3,5 @@
 The following guides explains how to build ABP based applications:
 
 * [TODO Application](todo/index.md): This is a single-part, quick-start tutorial to build a simple application with ABP. Start with this tutorial if you want to quickly understand how ABP works.
-* [Book Store Application](book-store/overview.md): This is a multi-part, complete tutorial to build a bookstore application with ABP. Start with this tutorial if you want to create a layered solution with ABP and apply DDD best practices.
+* [Book Store Application](book-store/index.md): This is a multi-part, complete tutorial to build a bookstore application with ABP. Start with this tutorial if you want to create a layered solution with ABP and apply DDD best practices.
+* [Modular Monolith Application](modular-crm/index.md): This is a multi-part tutorial that demonstrates how to create application modules, compose and communicate them to build a monolith modular web application.

docs/en/tutorials/modular-crm/part-06.md

@@ -653,7 +653,7 @@ See the following sections for additional resources.
 
 ### The Book Store Tutorial
 
-In this tutorial, we intentionally kept the application logic very simple and didn't build a usable user interface for the modules. This was to keep your focus on modularity. If you want to learn how to build real-world user interfaces with ABP, you can check the [Book Store tutorial](../book-store/index.md). All the principles and approaches explained there are already possible with a modular system too.
+In this tutorial, we intentionally kept the application logic very simple and didn't build a usable user interface for the modules. Also, didn't implement authorization and localization for the modules. This was to keep your focus on modularity. If you want to learn how to build real-world user interfaces with ABP, you can check the [Book Store tutorial](../book-store/index.md). All the principles and approaches explained there are already possible with a modular system too.
 
 ### ABP Reusable Application Modules