There aren't many people who can pull off such a blend of genres that unfold upon reading The Many Colored Land, but somehow May pulls it off. Normally one would expect some of each genre's fans to be turned off by her treatment, but the blend is entirely seamless. While the beginning of the book is mostly science fiction, when they actually get to the Pliocene, the science fiction elements, while still there, fade slightly to show the awe inspiring fantasy sequences.
But I haven't even gotten started on the story. Ah, the plot, I don't think I've ever seen anything like it before. It's complex yes, but when the book ends you get the sense that something has been accomplished, and that you haven't been reading four hundred pages to get shafted by a bunch of loose ends. There's a sense of closure. This is a book where you continue onto the next one because you want to, not because you feel some need to keep plodding on. It's just that good.
Oh, and just as an aside, those who are interested in the prehistory of this planet will find that most of May's research is completely accurate, keeping in mind of any new discoveries that have been made since the book was written. But the amount of research that had to go into getting the Pliocene right is astonishing, everything down to the crisp chill in the air warning of the Ice Age coming just a few million years down the road. The age comes alive.
But why listen to me ramble on? Read the darn thing already?