Have you heard of The Homeschool Library Builder website? It is run by homeschooling moms with kids ages 8-20 and they have a fantastic site with lots of books and activities. They are having a sale right now and have $1, $2 and $5 bins (some of the books are up to 92% off). This is a great way to build up your library with quality books for your children to read. The site is organized nicely into categories which makes it easier to look by topic but you can just search by title also.
They have a large selection of books and if they don't have what you are looking for they perform book searches to try and locate it for you. I also discovered that they have a frequent buyer program where you can earn points for purchases and for referring others.
There have been some issues with processing some credit card orders on their site. They are in the process of correcting it so if your order doesn't go through they ask that you please give them a call and they will help you with your order manually.
In the market for good books? Click on this link and enjoy the sale. Happy reading!