GOT THEM! Thanks to everyone who helped! My son is very happy. :)

Help! I just got my 7 year old son books 1-4 in this series in a great deal, and he went through them so fast I couldn't believe my eyes! He read them on the bus, in the car, and even while walking! Now he's asking for the next ones, (apparently there are about 44 books in this series!) and alas... my library does not have them!

Does anyone have at least a few of these on their shelf and want to make a deal? I will most definitely check out your shelf. Please PM. :)

Update:

I've gotten some great deals!  I've gotten more than half the series so far. :) Great response- PBS members rock! :)

Here are the books I still need 

(all from The Secrets of Droon series by Tony Abbott)

Got all the ones I needed that weren't WL'ed. Thanks!