William Wenton and the lost city

When a mysterious figure presents William with a strange pyramid-shaped puzzle, it sets in motion a series of events that sends William on a wild ride from Norway to England to the Mariana Trench, the deepest part of the ocean. Along the way, he ll discover that some of the people he knew can no longer be trusted and that the Institute for Post-Human Research is hiding a dark secret. He ll also discover an ancient civilization hidden under the ocean and a giant, mechanical, teleportation octopus.