This is an amazing, heartbreakingly beautiful novel.
Somewhere in the far past or the far future, Billie and Spike are leaving their world to explore a new planet, but will their people learn from their mistakes? The first signs indicate that they probably won't as the new planet is bombed to get rid of the giant lizards that live there so that it can be safe for the new settlers.
Action then moves to Easter Island where Billy has been abandoned to his fate, but will Spikkers be able to guide him through this strange barren world or to explain why the natives are chopping down the last tree?
Two more worlds and perhaps in the far past or the far future, Billie and Spike find themselves in the Dead Forest, listening to strange broadcasts from an unknown source.
Winterson is a brilliant writer and here melds environmental concerns with philosphical thoughts about reincarnation and meditations on what it is to be human. This is definitely her best book.