I think he just wanted to get it over with, what with all the fans clammoring for the final installment.
bummer that he passed away before finishing The Salmon of Doubt
every read his Dirk Gently books? Dirk Gently's Holistic Detective Agency and The Long Dark Tea Time of the Soul?
Corin, if you like the Hitchhiker's series, you might want to give these 2 a try later.