Secret Agent Jack Stalwart by Elizabeth Singer Hunt, this spring and they had been in my stack to read all summer. Well, my summer is gone. My stack - at least it greatly decreased. I finally managed to read these three over the weekend. #12 Fight For The Frozen Land, #13 Hunt for the Yeti Skull and #14 The Mission To Find Max
If you have young readers in your library (second - fifth graders), they'll love them.