I used the McGraw-Hill book to study for my TEAS V exam and scored a 70% overall with a low science score. Since I knew my scores weren't competitive for UTMB, I bought the book and online practice exams from ATI. I just took the test again this morning, 42 days after my original exam, and scored an 80% overall and an 80% on the science section. Wish I would have used the ATI book the first time!!!