Shutterfly is offer 50% off their 8×8 photo books through Wednesday, September 14th. This will make the books only $15 or you can get an 8×11 book for $20!
In addition to this promotion, they also have some other nice deals running:
Free shipping on orders of $30+ with promo code SHIP30
Take up to 50% off Custom Photo Ornaments through Thursday, September 15th
Take up to 20% off Custom Cards through Wednesday, September 28th
There is a limit of one coupon code per order. If you happen to be brand new to Shutterfly, they will also give you 50 free prints!