I heard about Yakov Perelman and his books. I just finished reading his two volumes of Physics for Entertainment. What a delightful read! What a splendid author. This is the exact book I've been searching for. I can use it to develop interest for science (math & physics) in my students.

His math books:

1. Mathematics Can Be Fun
2. Figures for Fun
3. Arithmetic for entertainment
4. Geometry for Entertainment
5. Lively Mathematics
6. Fun with Maths & Physics

His physics books:

1. Physics for Entertainment (1913)
2. Physics Everywhere
3. Mechanics for entertainment
4. Astronomy for entertainment
5. Tricks and Amusements

I want to get all the above books. Because books from author like this cannot be disappointing. But unfortunately not all of them are available. :(

I also read another amazing book How to Solve It: A New Aspect of Mathematical Method by G.Polya. This books actually teaches you how to think.

In the similar lines if you have any book suggestions (with very practical problems & case studies) for physics & Math (Please don't differentiate between math & physics here. If someone can develop interest in one of the subject he'll gain interest in other.) please contribute.

Cross Post: https://math.stackexchange.com/questions/10543/books-that-develop-interest-critical-thinking-among-high-school-students