Actually reading the book right now for the first time! I'm about halfway through and really enjoying it so far.
I did watch the show when it first aired so I'm struggling not to picture Tennant and Sheen in the main parts but i think they did a pretty good job so I'm not too worried.
It's my first Gaiman book but umpteenth Pratchett. I think a second TV series without TP will work better than a second book would've done.