Stewart Cowley authors two books in this series, following a hero, Hope Newman, navigating both a jungle/Mayan temple and a Pirate ship

The real hook of these books is Brian Lee's illustrations, which alone are stylistically well done, but more bought to life with the central transparent are on each page - effectively making each page a portal where you can see through to the next pages

While this is eye-grabbing for readers, frankly the puzzles are near impossible to solve, often with no real idea of what to find or where to find it. Nonetheless it's an enjoyable, if short series