Their magic tree house takes Jack and Annie deep into the sea, where they meet up with dolphins, sharks, and octopi as they search for the answer to an ancient riddle.

"From exciting and adventurous to educational and captivating, Bethany Stahl's immersive stories express heartfelt messages while engaging parents and children. With beautiful and charming illustrations, as well as a lovable sea turtle named Agwe, this is a book adults will love reading over and over again with their kids. Save the Ocean has a heartwarming lesson of recycling and conservation that will stay with the reader for a lifetime. There are...

When eight-year-old Jack and his seven-year-old sister, Annie, join a group of nineteenth-century explorers aboard the H.M.S. Challenger, they learn about the ocean, solve the mystery of its fabled sea monster, and gain compassion for their fellow creatures.