We have it through our school. But I believe you may be able to purchase it through Elsevier (the owner of HESI testing). They have info on the Elsevier website. If your school utilizes HESI they may...
I would definitely stay in! I am currently in a BSN program and learned the hard way that the textbooks do NOT help me pass the tests. I have had much more success spending at least 50% of my study...