Deeper Meaning Of Liff

"The Deeper Meaning of Liff" (WikiName: DeeperMeaningOfLiff) is DouglasAdams' extended version of his originally small book TheMeaningOfLiff. It includes more definitions, and illustrations, including maps of the town names which have been repurposed.

Does anybody have the ISBN for this handy? ISBN 0-517-58597-9