Thought this might be interesting and relevant for a lot of people here:
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https://www.humblebundle.com/books/unreal-unity5-book-bundle
$1
Building an RPG with Unreal 4.x
Unreal Engine Game Development Cookbook
Learning Unreal Engine Game Development
Getting Started with Unity 5
Mapt Subscription (30 days)
$8
Unreal Engine 4 Game Development Essentials
Unity 5 for Beginners (videos)
3D Game Design with Unreal Engine 4 and Blender
Blueprints Visual Scripting for Unreal Engine
Unity 5.x Game Development Blueprints
Unity 5.x Animation Cookbook
Unity 5.x Game AI Programming Cookbook
$15
Unreal Engine 4.X By Example
Unreal Engine 4 Scripting with C++ Cookbook
Unity 5.x By Example
Learning C# by Developing Games with Unity 5.x
Unity 5.x Cookbook
Unity Virtual Reality Projects
Building an Unreal RTS Game: The Basics (videos)
