This week's book giveaway is in the OO, Patterns, UML and Refactoring forum. We're giving away four copies of Refactoring for Software Design Smells: Managing Technical Debt and have Girish Suryanarayana, Ganesh Samarthyam & Tushar Sharma on-line! See this thread for details.
As for books, I didn't find the Little MongoDB Book very useful as it's quite out of date. But there are lots of online tutorials around, and the MongoDB Applied Patterns book is very handy too.