Number 27 is Thief of Time by Terry Pratchett. Time was I used to read everything Pratchett put out, but the sheer number of books he manages to write actually made that a daunting task, so I slowed down in my Pratchett consumption. Also, I discovered I liked some of his groups of characters more than others. My favourites are the Watch, and my second favourite is Death and his family. Thief of Time concerns Death and his granddaughter Susan.

Honestly, I didn't like this one as much, I didn't find it as... funny as I usually find his books. Discworld's version of Death is usually amusing, but he didn't have an awful lot to do in this book, other than to send his granddaughter Susan to look into the matter of time being stopped and the world ending, and then try and convince the other three, er, rather four, retired Horsemen of the Apocalypse to ride out with him.

I think I didn't like this one as much because there was too much chronobabble, as an impossible clock is built, time is collected and delved out by a group of enigmatic monks, and Time has a son, twice, who is both destroyer and savior. Something about it all just didn't work for me as much as it usually does in Pratchett's books.