An encyclopedia of people and projects of the Ouvroir de Littérature Potentielle. I've thoroughly enjoyed the works of Raymond Queneau and Georges Perec; it was fascinating to read about everything else the group got up to. Highly recommended; the type of book that'll make you go out and buy more books. (So probably the type of book that I should avoid, really.)
ISBN 1900565188. Search for this book on Wikipedia or isbn.nu.