Eharlequin is having a clearance sale with books going for $2.99.
Book Depository, the online bookstore that offers free international shipping, is six and they're having a promo. You can refer up to 10 friends to receive a 10% discount voucher from Book Depository. If your friends make a purchase, you get to receive a voucher in return. That's ten vouchers for ten friends. Sounds good, huh?