HI guys, I have to decide on one of these books for the exam of Excelsior: Psych of Adulthood and Aging: Adult Development and aging by McGraw Hill or Adult Devel and Aging by Cavanaugh or Adult Devel and Aging by Hoyer These are the ones that I found, so which one should I buy and if any others are recommended, please let me know. Any advice would help me a lot. Thank you very much