Reddit mentions of Unity 2017 2D Game Development Projects: Create three interactive and engaging 2D games with Unity 2017

Here are some good books I recommend to you.

They can be read on the go as well, though they are mostly project based, therefore they require you to do the projects on the computer while you are reading. But of course you can read it anywhere and then later when you are near the computer, you can attempt to recreate the little games they show. (thats what I did with the first book on this list)

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• Jonathon Manning & Paris Buttfield-Addison: Mobile Game Development with Unity: Build Once, Deploy Anywhere
  
• Joe Hocking: Unity in Action: Multiplatform game development in C#
  
• Ashley Godbold: Mastering Unity 2D Game Development - Second Edition
  
• Dr. Edward Lavieri: Getting Started with Unity 2018 - Third Edition: A Beginner's Guide to 2D and 3D game development with Unity
  
• Lauren S. Ferro & Francesco Sapio: Unity 2017 2D Game Development Projects: Create three interactive and engaging 2D games with Unity 2017