Here's a fast and easy way to make some money. Collect all 13 books in this series and cha-ching! If they are all hardback then you can easily make $60+.
I just recently bought all 13 books for $15 and resold them for $74.99 (Buy-It-Now). The only reason I did a buy-it-now auction was because I needed money for Christmas.
Happy hunting!
Happy hunting!