The Zang-fu Mathical™ Series  in
Disappearance Calculus (boundary mathematics),
HTML ebook format

Level 1      Who is the Foo? a Grabmonsters Mystery     HTML ebook

Level 2.1   The Grabmonsters Find Some Valuables     HTML ebook

Level 2.2   Grabmonsters Out of the Box     HTML ebook

Level 5      Grabmonsters Build a Trap     HTML ebook