Well...this is the second or third Terry Pratchett book I've ever read and I remember that I liked the other(s?) but this one simply wasn't for me I think. I didn't really feel as if the story was going somewhere and the science part, even though funny from time to time, was quite confusing hopping back and forth and a big part of it just felt like somebody read something somewhere and retells it in a sloppier way. I'll try the third part of the series though, maybe it was just that book which I didn't like ;)