You can save a lot of time and money by stocking your family library with books that can be used throughout your homeschooling years. Here's what I look for when I go book shopping:
I look for biographies that make learning about famous people fun for kids. I especially like Childhood of Famous Americans, Opal Wheeler biographies, and Rookie Biographies . I know these are wholesome books.
I look for classic literature published with interesting illustrations. Because much of the classical literature is written in vocabulary that is often no longer used or difficult to understand, good illustrations help hold a child's attention. (I also keep a dictionary handy! Try reading Robinson Crusoe in it's original version and you'll see what I mean.)
I look for science and history books...