Thief of Time (by Terry Pratchett)

In my gradual re-reading of Terry Pratchett’s ‘Discworld’ books, I reached the 26th in the series, ‘Thief of Time’. I’m surprised how much I’m liking some of the books, including this one. It wasn’t unputdownable - some days I read only a few pages, so it took me over a week to finish - but the plot is cleverly done, and some of the concepts stayed with me even though I had totally forgotten the story itself.  Not surprising, really, since I had only previously read it once, back in 2001 when i...