1. Aims to be most up to date book for retail market on the latest Unity game engine and the new Android 7 platform.
2. Sell Like should be similar Chu's Learn Unity 4 for iOS Game Development where ebook and print combined for over 1,200 units total Net Sales. Could even sell more units given Unity's growth since and Android now has greater market share worldwide than iOS.
3. Unity has over 4 million developer base and strong market share: https: //unity3d.com/public-relations