I am currently taking Physics II and need a good textbook to complement my course. We are using a free one, Spiral Physics, which is relatively worthless. It explains very basic concepts, but gives very few (if any) real-world examples and at least half the answers in the back for Physics II are wrong, so you have no way to even check yourself to make sure you are doing it all right. I have heard of Halliday and Morin (have the Morin Classical Mechanics already), but not sure how either of their books are for Physics II? I would like something challenging, comprehensive, has a good amount of problems with answers to try out, and digestible to someone who is still in the process of taking Physics II.