Thumble Tumble and the Ollpheist
Author: A.H. Proctor
Forth Books
Published July 2017
 Thumble Tumble and the Cauldron of Undry
Author: A.H. Proctor
Forth Books
Published October 2016
Thumble Tumble and the Eagalach Cup
Author: A.H. Proctor
Forth Books
Published September 2017