Flanimals: The Day of the Bletchling (ISBN 0571238513) is the fourth book in the Flanimals series from British comedian Ricky Gervais and illustrator Rob Steen. The book was published on 4 October 2007 and focuses on the Flanimals teaming up against an enormous swarm of Bletchling, a species that seeks to wipe out all other Flanimal life. The hardcover version of the book comes with a poster featuring a Clunge Ambler and a Molf, in a parody of the movie Jaws. Source: Wikipedia (en)