A now obsolete game development book using the Unity game engine, published by Apress (there's also a second edition, but from what I've seen of it, I'm not that happy with the changes)

Learn Unity 4 for iOS Game Development | Philip Chu | Apress
Unity is an incredibly powerful and popular game creation tool, and Unity 4 brings even more great features, including Mechanim animation. Learn Unity 4 for iOS Game Development will show you how to use Unity with Xcode to create fun, imaginative 3D games for iPhone, iPad, and iPod touch. You’ll...

A self-published compilation of software development essays, which I removed from Amazon, but there were some nice reviews.

Technicat on Software by technicat
Essays by me

Amazon Reviews of Learn Unity 4 for iOS Game Development (first edition)

Amazon Reviews of Technicat on Software

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