Set in an underwater complex in the North Atlantic, this is a thriller with futuristic overtones. Whether the technology now exists to drill into the earth's crust to reach the Mohorovic discontinuity, that is the bsis of the story and the engineering and
other aspects are probably accurately described. Densely written with sometimes unnecessary elaborations, the author keeps things moving along satisfactorily to an explosive denouement and a logically disturbing afterthought. Better known as the co-author with Douglas Preston of a series of books, Child's individual effort here is acceptably entertaining.