Kes: I should hope not or else I'm on incredibly thin ice.

I always thought that So Long and Thanks for All the Fish paled by comparison to the first three myself and that the first book was the best of the lot, but I definitely need to give the series a read again. I've still not actually read Mostly Harmless but have been warned by numerous people that it's pretty bad by comparison. The Dirk Gently books are something different, but well worth a read. Slightly odd and not quite as funny as HHG, but still books I really enjoy. Dirk is a fantastic character.