Fitzpatrick 2U textbook is despised by my class mates and even myself. Its examples and theory sometimes don't cover the harder questions, and the lack of worked solutions makes it hard to push yourself to understand the higher order questions that are generally at the end of each exercise.
Classmates and I try to work these out, but its hard when the theory in the book and examples pretty much only cover the first half, at most, of the exercise questions. Without a teacher to ask it would be very hard.
This is just my opinion and that of my class mates as well. Take it with a grain of salt