Has he checked textbooks.com and amazon.com? I bought almost all my textbooks used off Amazon. Even with used books, Amazon handles the payments and doesn't charge until the seller confirms shipping. It's pretty safe, just have to make sure you do it far enough in advance that they arrived before classes really get going.
I also created a seller account to resell them after the semester was over.
Saved me TONS of money.
Glad you got to go home early at least! LOL
Michelle - Proud DR Rockette S: 28JUL07, D'd: 29OCT09 http://tinyurl.com/27j9qo2