Alan Thorn 
Unity 4 Fundamentals [EPUB ebook] 
Get Started at Making Games with Unity

Get ahead of the game with Unity 4.The Unity engine is the tool of choice for many indie and AAA game developers. Unity 4 Fundamentals gives readers a head start on the road to game development by offering beginners a comprehensive, step by step introduction to the latest Unity 4 engine. The author takes a theory-to-practice approach to demonstrate what Unity 4 has to offer which includes: Asset management tools Real-time lighting and lightmapping Particle systems Navigation and pathfinding