diff --git a/book/chapter-02-the-package-based.md b/book/chapter-02-the-package-based.md
index 889e7599..3a2fa771 100644
--- a/book/chapter-02-the-package-based.md
+++ b/book/chapter-02-the-package-based.md
@@ -56,6 +56,7 @@ Models builds the foundation of data relationships in form of entities.
 #### Services
 
 Services are a façade for bot back-end logic and other custom processing.
+all GeneralBots functionality comes down to services.
 
 #### Tests