Hello. I 'm a homeschooler too.  I would recommend David Copperfield by Charles Dickens; The Count of Monte Cristo; Shadow of the Spear; The Left Behind Series; oh, I'll have to ask my son for more.  He's read a lot.  I find that Homeschoolers usually read the same things so your children have probably read most (if not all) of what I could recommend.  Let me know about what I've given you so far.

Kati,  There is one book about history that I think you can find on the KCM.org website. It has a picture of George Washington on it. (it is suppose to be really good)  You can also look up Christian Liberty Press, they put out books you can buy for reading. (or you could go to their website and look at what they have and see if you can find it at the library. ) You can also go to Vegsource.com click on homeschooling swap, then find christian homeschooling swap . I have bought from people on there and have been pleased. It also has per grade level. There is also a miscellaneous on the homeschool swap that you may find reading books too.  You can also go to Ebay and put in Christian homeschooling reading books or homeschooling reading books and see if there's anything you like there.

Thanks for all your help - all of you!