A friend recently turned me on to the books by Holling C. Holling - a learning approach to geography, history and science through literature.  We've checked a couple out from the library and love them.  We're looking so buy them used if anyone has some their interested in selling.  I'm willing to pay $4-5 per gently used book.  The ones I'm specifically looking for are listed below but I'd be interested in any by him.  
Thanks so much!
Sharon
Paddle to the Sea
Tree in the Trail
Minn of the Mississippi
Pagoo
Maps and Study Guide

I'm also interested in buying any of the Junior Great Books series listed below... either the anthology and/or the teachers guide.  
Thanks!
Dragon Series
Sailing Ship Series
Sun Series
Pegasus Series