Everyone's heard of Douglas Adams I expect! Anyway, I think he was great, and I'm pleased to have all 5 of his hitch hiker books in the nice new re-release matching set (with the original cover art on them!). I've also got the radio show on tape and the TV series on video, but the pride of my collection is the double vinyl of the Hitch Hiker story, based on the radio show, published by Original Records in 1979!

And Douglas Adams lives forever in the superb h2g2 project (like an online hitch hikers guide) which can be found here