I have just been searching abebooks.com in the hope of finding a copy of the Van Nuys Mathematical Handbook when I came across a book titled "Curta Calculator", editors Miller, Vandome and McBrewster, published by Alphascript. The UK price is £27.69. It is a print-on-demand book, released June 2011. The well-known search engine tells me that these "editors" have produced over a thousand books, nearly all of which are copies of Wikipedia pages. Not illegal, apparently, but definitely not worth £27.69. I have e-mailed the bookseller for a list of the contents.
See: http://en.wikipedia.org/wiki/User:PrimeHunter/Alphascript_Publishing_sells_free_articles_as_expensive_books

Peter Johnson