The College Board has a book with 2 each level 1 and level 2 math exams. I find they are easier than Barrons or Dr. Chung’s. Also, the prep books seem to make up several similar problems for every problem on the released real exams. So while you have to work with prep books, I would advise concentrating on the real exams as much as possible. There is also a book of one exam for each subject and similar books of 2 exams each on related subjects.