1. Mostly Harmless by Douglas Adams 229pg [ebook]
These books seem to get a lot less funny as they go along. I found this a little tedious, although it did get better towards the end. It's the 5th Hitchhikers' Guide to the Galaxy book, and the last (of 7) that was actually completed and published by Douglas Adams (Salmon of Doubt is constructed from drafts, and there is another after that written by a different author). I was planning on reading the last two after this, but the ending seems final enough to leave the series on, at least for the time being.
