Some books like my economics book come with a key code that's required for the class (graded online homework)... :wall: And if you don't wanna spend the $95 or so on the textbook/key code combo (shrinkwrapped, mind you), then you can find that key code on the Aplia website for $80. -.- Looks like I'll be down about $300 this semester for an Accounting book, Macroeconomics book, Meteorology book, and an Intro to Psych book. So far I only have the Psych book that I've rented for $48. It appears I can perhaps rent the Meteorology book for ~$38, which seems mint, but I'm sol for the other two. <_<