These range in level from 5 to 7. These booklets are produced in Hungary by hand in limited editions; their contents are made of laser cut wood. This particular puzzle is based on a known mathematical dissection. a2+b2=c2 has two challenges: Fill the two smaller square frames inside the booklet. Fit all the pieces into the largest square frame inside the booklet. Cleverly designed with an attractively innovative book cover. Solution is included. Made by Péter Gál.