Magic Tree House
First published in 1992 written by Mary Pope Osborn.
The Wonderous Adventures of Jack and Annie
The magic tree house was an elementary school favorite no matter what grade you were in. Everytime the teacher pulled one of the Magic Tree house series and started reading, the kids were immedietly taken away by Jack and Annie through their majestic adventures. As the teacher read these books to us we felt like we were there in the tree house prepared to embark on a magical journey in some exotic part of the world.