"First published by the Penguin Group, 1988. ISBN 0-723222128"--T.p. verso.
"Featuring self-guided walks following in the tracks of Benjamin Bunny, Squirrel Nutkin and Mrs. Tiggy-winkle."
Beatrix Potter's Derwentwater by Joyce Irene Whalley. ISBN 9781850588795. Published by Sigma Leisure in 2010. Publication and catalogue information, links to buy online and reader comments.