Tentacles (Cryptid Hunters, Book 2)

The story follows 13-year-old twins Marty and Grace O'Hara, who, after their parents vanish, find themselves under the care of their Uncle Wolfe. He embarks on an adventurous expedition to New Zealand to hunt for a giant squid, but tensions rise as a saboteur lurks among the crew, threatening their mission. As the twins navigate this perilous journey, they must confront both the mysteries of the sea and the challenges of their new reality.