My favorite of the Sandman series, probably because I can sooo relate to Delirium. The multiple stories and characters are woven together beautifully, something Gaiman excels in. Sandman is probably at his most human in this book, which was interesting to see, and another reason I love it. Within the series, it is a vital part of the story, of course. Parts will mean a lot more to you if you've read the former books, and the resolution of Sandman will make more sense after you've read this. But, I went out of order, and this was the FIRST Sandman book I read, which got me addicted to the series. And I can say that it works as a stand-alone, too.