One of the joys is when you re-read one of his books and discover its tie-ins with the other books in his universe. Small Gods has a tiny but important role for

One of the joys is when you re-read one of his books and discover its tie-ins with the other books in his universe. Small Gods has a tiny but important role for Lu Tze the history monk, who subtly interferes with the story to see it to its conclusion. But I completely missed it as a plot point until I’d read Thief of Time, which explained the whole point of the history monks. Then they show up again in Night Watch. His fictional universe evolved - but also circled back and reinforced itself. (Mostly!)