And Another Thing… is the title of the sixth installment of Douglas Adams' The Hitchhiker's Guide to the Galaxy "trilogy". The book, written by Eoin Colfer, author of the Artemis Fowl series, was published on the thirtieth anniversary of the first book, 12 October 2009, in hardback. It was published by Penguin Books in the UK and by Hyperion Books in the US. Colfer was given permission to write the book by Adams's widow Jane Belson.