With *Sea of Silver Light* , Tad Williams completes his massive Otherland quartet, one of SF’s more intriguing explorations of the eroding boundaries of the human and the nonhuman, the living and the dead. Otherland is a sequence that contains many secrets, and Williams plays fair by unpacking all of them in the final book. A group of adventurers searching for a cure for comatose children find themselves trapped in a sequence of virtual worlds, the only opponents of a conspiracy of the rich to live forever in a dream. Now, they are forced to make an uneasy alliance with their only surviving former enemy against his treacherous sidekick Johnny Wulgaru, a serial killer with a chance to play God forever.
Williams manages a vast cast of emotionally involving characters with considerable panache, but the real strength of the book is its endlessly questing intelligence; it is, among other things, an enquiry into the nature of storytelling as a way for human beings to give structure to their perceptions of the universe around them. It is as story that *Sea of Silver Light* ultimately works so well–involving us in the grueling descent of a vast mountain, the siege of an underground fortress, gun battles in a nightmare Wild West. Williams never neglects to tell us how things feel. He efficiently ties up every plot strand and convincingly reveals every secret in this large, complex plot. *–Roz Kaveney, Amazon.co.uk*