I don't know if disappointing is as good a word an underwhelming. The show was excellent, well written and executed, and is one of the few shows I have seen where I have been truly impressed with each episode. The books, however, at least the few that I have read, have been written on a level considerably more juvenile than the show itself was, and, as often as not, the characters seemed nothing like they were portrayed in the series. I don't know if Joss has any input or control over the novels' content, or if he has even read any of them, but I can;t see how he could be responsible for such poor novelizations and at the same time produce the Series 8 books, which are excellent, especially considering the limits of the media.