If you have the Tortora book, then you do not need this atlas. I would highly, highly recommend that you do not waste money on this atlas. Spend a few more dollars and get a copy of the Netter's atlas for students. Trying to use this atlas in my human anatomy lab/class (intro) has been nothing but annoying. Many important landmarks are overlooked and I have repeatedly had to refer to Netter's to figure out where landmarks are. Avoid this atlas and save your money and frustration.