Notes

ambigrams & other visual puzzles to amaze and entertain
Burkard Polster
ix, 236 p
ill. (some col.)
Summary: Ambigrams are words that are written or drawn so that they can be read in more than one way, back to front, upside down, turned this way and that. The history and philosophy of the form are explained. Shows how to make ambigrams and sharpen your mind on mind-bending problems