One of the best books for UE4 by Packt in $10

[Unreal Engine 4 Game Development Quick Start Guide][1]

https://www.packtpub.com/media/catalog/product/cache/6b1c09900b407c50fce2db5e66ebc123/0/6/0687cover.png

Learn

How to use Unreal Engine 4 by building 3D and multiplayer games using Blueprints
Use project templates to give your game a head start
Create custom Blueprints and C++ classes and extend from Epic’s base classes
Use UMG to create menus and HUDs for your game
Create more dynamic characters using Animation Blueprints
Learn how to create complex AI with Behavior Trees
Use replication to create multiplayer games
Optimize, test, and deploy a UE4 project

About

Unreal Engine is a popular game engine for developers to build high-end 2D and 3D games.

This book is a practical guide, starting off by quickly introducing you to the Unreal Engine 4 (UE4) ecosystem. You will learn how to create Blueprints and C++ code to define your game’s functionality. You will be familiarized with the core systems of UE4 such as UMG, Animation Blueprints, and Behavior Trees. You will also learn how to use replication to create multiplayer games. By the end of this book, you will have a broad, solid knowledge base to expand upon on your journey with UE4.

Author

Rachel Cordone is a game designer and programmer who has been working with the Unreal Engine since the 1990’s. She has worked with various game and simulation companies since 2003 on everything from PC, console, mobile, to VR and AR projects. For the past decade, Rachel has offered remote contract programming services to training software development companies including Northrop Grumman and Parsons Brinkerhoff.

Thanks for creating learning content.

https://forums.unrealengine.com/community/community-content-tools-and-tutorials may be a more appropriate place to announce/discuss this book.