Published by Constable & Robinson in the U.K. in October 2007, by Allen & Unwin in Australia in February 2008 and by Sterling in the U.S. in April 2008 (there is no difference between these different releases, except for the name of the publisher).

Here is the somewhat outdated Eye Twisters page which originally served as something like an online book proposal for a book on ambigrams. Although the actual printed book is also primarily about ambigrams, it bears very little resemblence to the book that I had in mind originally. Still, the ambigrams featured on these pages may still be of interest. Eye Twisters was published in the U.K. by Consta