diff --git a/free-programming-books.md b/free-programming-books.md
index ee1a0f751406b3bedf0902b4ccaa83cdc9a5d4c8..daeb41d98c0ef9d5769fe16a06afae36234e097e 100644
--- a/free-programming-books.md
+++ b/free-programming-books.md
@@ -2070,9 +2070,12 @@ For resources on Angular, Backbone, D3, Dojo, Ember, Express, jQuery, Knockout,
 ### Scala
 
 * [A Scala Tutorial for Java programmers](http://www.scala-lang.org/docu/files/ScalaTutorial.pdf) (PDF)
+* [Advanced Scala with Cats](http://underscore.io/books/advanced-scala/) - Noel Welsh and Dave Gurnell (PDF, HTML, EPUB) *(Just fill the fields with any values)*
 * [Another tour of Scala](http://naildrivin5.com/scalatour/)
+* [Creative Scala](http://underscore.io/books/creative-scala/) - Noel Welsh and Dave Gurnell (PDF, HTML, EPUB) *(Just fill the fields with any values)*
 * [EAI Patterns with Actor Model](https://github.com/alexanderfefelov/eai-patterns-with-actor-model) - Vaughn Vernon
 * [Effective Scala](https://twitter.github.io/effectivescala/)
+* [Essential Scala](http://underscore.io/books/essential-scala/) - Noel Welsh and Dave Gurnell (PDF, HTML, EPUB) *(Just fill the fields with any values)*
 * [Learning Scala in small bites](http://matt.might.net/articles/learning-scala-in-small-bites/)
 * [Learning Scalaz](http://eed3si9n.com/learning-scalaz/)
 * [Pro Scala: Monadic Design Patterns for the Web](https://github.com/leithaus/XTrace/tree/monadic/src/main/book/content/)
@@ -2089,6 +2092,7 @@ For resources on Angular, Backbone, D3, Dojo, Ember, Express, jQuery, Knockout,
 * [Scala Tutorial](http://www.tutorialspoint.com/scala/scala_tutorial.pdf) (PDF)
 * [tetrix in Scala](http://eed3si9n.com/tetrix-in-scala-html5-book)
 * [The Neophyte's Guide to Scala](http://danielwestheide.com/scala/neophytes.html) - Daniel Westheide
+* [The Type Astronaut's Guide to Shapeless](http://underscore.io/books/shapeless-guide/) - Dave Gurnell (PDF, HTML, EPUB) *(Just fill the fields with any values)*
 * [Xtrace](https://github.com/leithaus/XTrace/tree/monadic/src/main/book/content/)
 
 
@@ -2102,6 +2106,7 @@ For resources on Angular, Backbone, D3, Dojo, Ember, Express, jQuery, Knockout,
 
 #### Play Scala
 
+* [Essential Play](http://underscore.io/books/essential-play/) - Dave Gurnell (PDF, HTML, EPUB) *(Just fill the fields with any values)*
 * [Play Framework Recipes](http://alvinalexander.com/scala/scala-cookbook-play-framework-recipes-pdf-ebook) - Alvin Alexander