The riddle

Revision	When	Who	Comment

9	May 18, 2020	CoverBot	Added new cover
8	April 5, 2014	ImportBot	Added IA ID.
7	May 3, 2012	ImportBot	import new book
6	August 18, 2010	IdentifierBot	added LibraryThing ID
5	April 16, 2010	bgimpertBot	Added goodreads ID.
4	March 26, 2010	ImportBot	Found a matching Internet Archive item record
3	December 15, 2009	WorkBot	link works
2	October 28, 2008	ImportBot	Found a matching Library of Congress MARC record
1	October 16, 2008	ImportBot	Imported from Library of Congress MARC record