Textbooks 
Gregor Skacej and I have written a book of solved problems in thermodynamics. Topics covered span the standard advanced undergraduate course for physics students:
The book includes exactly 100 problems. Take a peek: Second, corrected printing now available! 
We also wrote a book of solved problems in statistical physics. Most of the problems are on advanced undergraduate level but some are a little bit more complex. Contents:

Comments...We will be very happy to hear what you think about the books. Let us know if you find an error; the two dedicated repositories are here and here. 