Seth's Salvage Yard - A large selection of Three Investigators books for sale.
The Book Safari - "This is the place where you can buy all those classic series books that you read as a kid." An excellent selection of books, including many Three Investigators. Organized by series or author.
Bibliomaniacs Used Books and Comics! - "This site is dedicated to everyone who read under the covers with a flashlight past their bedtime." A good selection of Three Investigators and other series books for sale.
Books Remembered - "Home to those great juvenile series books from our past." Organized by series. A very good selection of Three Investigators books.
Advanced Book Exchange - An online network of used book dealers.
Bibliofind - Another online book dealer network.
eBay Auctions - The place to find Three Investigators books, but prices can skyrocket with heavy bidding.
This page last updated on 07-Oct-08