De Courcy, Ken: Son of Pentertain ©1974 The Supreme Magic Co., Ltd., Bideford, England Softcover, saddle-stitched, 8x10", 17 pages

Image from Magicref

Comments: The second in a series of three books using mathematics (usually) and drawings to create entertaining and humorous stories, sometimes with a bit of magic. The other books in the series are "Pentertain" and "Mistress of Pentertain"

Contents (from book):

1 Introduction
2 Photos: Two B&W photos of Ken
3 A Timely Legend: a visual story of the invention of the clock dial
5 No Time for Work: where the boss proves we get paid for no work
7 The Cure for Insomnia: a slightly off-color use of the 1089 math problem
11 Sheik a Leg: sharing 17 concubines among three sons
13 Sheik Another Leg: how to get 10 people to sleep in 9 beds
15 Cross Check: winning or drawing tic-tac-toe every time without seeing the board
16 - The Toss: easy way to win who goes first