Make: Electronics by Charles Platt is a very good beginners book with lots of projects. Not Arduino specific though.

http://oreilly.com/catalog/9780596153755

I just saw this today...it might fit the bill:

"Make: Electronics -- Learning Through Discovery" By Charles Platt; Released: December 2009 (est.) ; http://oreilly.com/catalog/9780596153755 "With this practical introductory guide, you'll learn important concepts while you work on real projects."