Hi, I would like to ask for opinions about the above two textbooks. University Physics by Young and Freedman Physics for Scientists and Engineers by Jewett Serway I would like to ask for opinions about the above two books. I did a few problems from both books, and it seems that the problems from University are easier and only tests your grasp of the concepts, but Jewett Serway problems are much more challenging and interesting. However, I am not too sure about the content of the books. The University Physics textbook looks thicker. Does that mean that this textbook is more complete when dwelling about the different topics? Would like to hear opinions from people who used these textbooks before. Thanks :) P.S. If I want to find a book with a lot of interesting and challenging physics problems, which book(s) do you recommend?