Planet Green writer Ronnie Citron-Fink wrote a great post about how having books around the house had a large impact on children's literacy rates. She mentions that there are several options for those who can't afford to buy books, including using the library, playing word games, and requesting help from organizations like First Book.

Those are all wonderful tips (we are major library fans at our house!) and I'd like to add one more tip into the mix: buy used books.Let's face it: they're going to get dog-eared, and maybe even torn and colored in. Especially for toddlers and preschoolers, it makes sense to get your books as cheaply as possible. Here are a few sources for used books.

Where to Buy Used Children's Books

1. Yard sales. I have found the best bargains on kids' books at yard or garage sales. I especially love it when people put out a box of books and say the books are five for a dollar or something like that -- we've added a lot to our home library that way.

Most local libraries have book sales once or twice a year, in which they get rid of books they no longer have room for. While these books can sometimes be really outdated, these sales are also a good source of classic story books and series books. Used library books usually cost more than those you'd find at a garage sale, but not much more, and the money you spend goes to helping the library buy more books -- a win-win all around.

3. Used book stores.

If you have a good used book store in your area, chances are that they will have a children's section. The inventory at any used book store fluctuates, so it's worthwhile to check in regularly if you're trying to get particular books. It's also a good idea to try to find out from the staff when they shelve new arrivals -- this can help you get first dibs on any newly stocked books.

4. Better World Books

Shopping online is definitely convenient, and if you're looking for used books online, one of my favorite sources is Better World Books. Not only do they sell used books at reasonable prices, but they also donate the money to charities and allow you to buy carbon offsets for your shipping.

5. Thrift stores. I haven't had a ton of luck with thrift stores, but it's worth checking out your local shops to see if they stock many children's books. As with used book stores, the inventory will change as they get items in stock, so it's a good idea to check in regularly. Books inform, entertain, and provide a wealth of knowledge and inspiration for our children. They are worth having around. I hope these ideas help you stock your home library with plenty of great kids' books, without breaking the bank. And as a bonus, you're keeping these books out of the landfills. What's not to love?