Notes: Publication date from Amazon UK as of 2011-01-18. This edition has two different ISBNs and barcodes on the back cover, one below the US/Canada price (ISBN above) and one below the UK price (ISBN 978-0-71564-097-5). The only ISBN listed on the copyright page is for the US/Canada edition, however this publication presumably doubles as the Gerald Duckworth edition as the back cover also states that publisher's website address (www.ducknet.co.uk), though no actual mention of the UK publisher is made anywhere else in this edition. Also priced £8.99 and $20.00 in Canada. 3rd printing from 1 - 9 number line.