It's a wonderful Liff

I am indebted to whichever anonymous Wikicontributors for the following gems concerning the late Douglas Adams and The Meaning of Liff:

1. The original definition of Liff, as contained in The Meaning of Liff, is 'A book, the contents of which are totally belied by its cover. For instance, any book the dust jacket of which bears the words, "This book will change your life."' Which, of course, The Meaning of Liff does. (Does have it on the cover, I mean. It may also change your life.)
2. a) In the revised and updated edition of the book - The Deeper Meaning of Liff - the definition of the titular Liff is different. b) It now means a phenomenon for which there is no word. 
3. There is a German version.