One of the only subscription-type services I ever used was this Dr. Seuss and His Friends Club.  We got our nice set of beginning readers through it when my oldest daughter was a toddler.

Right now, The Dr. Seuss and His Friends Club are offering a pretty great deal!  You can get five books for $3.95 shipped AND you get to pick the books you want.  You’ll also get a free activity book while supplies last.

More info:
– Receive 3 new books each month
– Create lasting memories with the same classic stories you loved as a child
-Wacky and wonderful characters will engage & entertain your child and you
-Control your membership online
-Risk free. Cancel anytime.
-No Purchase commitment!
-High-Quality, hard cover editions
-Convenience of home delivery for less than $5 per book!

Remember that this is a subscription, so you’ll need to follow the directions on the site if you don’t want any other shipments.