Paperback, Penguin Fourth Reprint, 50gms, 141 pages. This is Edward de Bono's original portrayal of a mental process which he in no way claims to have invented. Book is in good condition with mild general wear and tear, mild to moderate page discolouration, crease to the front cover and several pages following, otherwise no other pre-loved markings. Attached picture is of actual book. Purchase more than 1 item and save money with combined postage. And if you can't find the title you're looking for - why not ask us direct. With over 30,000 books in stock we can't list them all!