* Included open sourced books from underscore.io

as per http://underscore.io/blog/posts/2017/05/29/why-we-open-sourced-our-books.html list of this books are open sourced:
Essential Scala
Learn to write robust, performant, idiomatic Scala. A focused guide for established developers.
Advanced Scala with Cats
Dive deep into functional patterns using Scala and Cats. For experienced Scala developers.
The Type Astronaut's Guide to Shapeless
Scrap your boilerplate and derive type classes with shapeless. For experienced Scala developers.
Essential Play
Learn to use the Play web framework to build web sites and services. For new to intermediate Scala developers.
The Lift Cookbook
Learn to use the Lift web framework to build web sites and services. For new to intermediate Scala developers.
Creative Scala
Learn functional programming with pictures! A fun and practical introduction for new developers.

* Included open sourced books from underscore.io alfabetically ordered

* Included open sourced books from underscore.io - addition of - Just fill the fields with any values