$6, Secrets of a Phone Sex Operator ($12 on Amazon)
$7, Teaching Introductory Psychology ($16 on Amazon)
$3, When Friendship Hurts ($12 on Amazon)
$4, Catching Fire ($11 on Amazon)
$5, What to Do When There's Too Much To Do ($11 on Amazon)
$5, Kiss That Frog!: 12 Great Ways to Turn Negatives into Positives in Your Life and Work ($16 on Amazon)
$10, Super Freakonomics (Hardcover, $24 on Amazon)