Ever since Marty and Grace’s parents disappeared on an assignment for a nature magazine, the twins have been living with their eccentric Uncle Wolfe. He’s a scientist fascinated by cryptids – creatures that appear in myths but haven’t been proven to exist, like the Loch Ness Monster. Now Uncle Wolfe is planning an expedition to New Zealand to track down a rare giant squid. But when Marty and Grace set sail on his ship, they’re soon plunging deep into danger. Not only does the ship seem to be haunted, but someone on board is determined to sabotage the mission. And if Marty and Grace keeping poking their noses in, they might end up as the saboteur’s next victims… A terrifying nautical adventure from the author of Jungle Hunters.