diff --git a/source.md b/source.md
index b6067b5..558da33 100644
--- a/source.md
+++ b/source.md
@@ -47,6 +47,7 @@ Also 👍| ⭐| 👏 links to support their authors !
 - [Frameworks](#frameworks)
 - [Open Source Apps](#open-source-apps)
 - [Utilities](#utilities)
+- [Books](#books)
 - [Bonus](#bonus)
 
 ## Articles
@@ -368,6 +369,9 @@ Also 👍| ⭐| 👏 links to support their authors !
 - [r/FlutterDev Subreddit](https://www.reddit.com/r/FlutterDev/) - Reddit community by [u/JaapVermeulen](https://www.reddit.com/user/JaapVermeulen)
 - [Dev Discord](https://discord.gg/N7Yshp4) - Discord server to discuss and get help by [Pritykin](https://twitter.com/AndrewPritykin)
 
+## Books
+- [Flutter in Action](https://www.manning.com/books/flutter-in-action?a_aid=flutterinaction&a_bid=d08c3247) - Complete Flutter and Dart resource, currently in 'Early Access'. (42% off with code 'slwindmill').
+
 ## Bonus
 
 - [It's All Widgets!](https://itsallwidgets.com) - Open list of published apps by [Hillel Coren](https://twitter.com/hillelcoren), [Thomas Burkhart](https://twitter.com/ThomasBurkhartB), [Simon Lightfoot](https://twitter.com/devangelslondon) and [Scott Stoll](https://twitter.com/scottstoll2017)