flamingdog

Yeah, he did write the fifth book, Mostly Harmless.

Although it's known as a trilogy in five parts, it really should be a trilogy in three parts, as Kadath said. I only read the fourth and fifth books in the series for the sake of completeness, I consider them vastly less imaginative than the first three, although just as well written.

edit: Martin Freeman will be a great Arthur Dent too. He is better known to limeys as Tim from The Office.