Author and explorer Graham Hancock continues his pursuit of uncovering clues to the past, this time under the sea. Underworld is the narrative of a journey through the Mediterranean, the Arabian Sea, Persian Gulf, Bay of Bengal and the Pacific Ocean around Indonesia, Japan and Taiwan in which underwater structures of possible human origin are explored. The government of India has recently authenticated two of Hancock's discoveries off the coast of that country. In both cases, these structures are dated between 9000 and 11 000 years before the current era, which supports the theory of a great flood that submerged vast areas of land at that time. What I really like about Hancock is that he provides the orthodox view at the same time as his own theories. I cannot but agree with his statement, "There's something wrong with the underpinning of history." Hancock has indicated the most likely places for pre-flood civilizations with the help of Dr. Glen Milne of Durham University who is an expert on glaciation-induced changes in the sea level, and taking into account the plethora of flood-myths found amongst all cultures on all continents. Underworld is lavishly illustrated and well served by a thorough index and extensive bibliography. This gripping text will amply reward the reader who enjoyed Hancock's earlier titles like Keepers of Genesis and Fingerprints of the Gods. Hancock deserves credit for stimulating interest in history and archaeology. He was the writer that created interest in those little doors in the light shaft of the great pyramid that was recently in the news. Let's hope something will be revealed behind the second door! In the mean time, I thoroughly enjoy Hancock's speculations.