Ty discovers an entire township chained to a sunken submarine, its inhabitants condemned to an icy underwater grave. It's only the first clue to a mystery that has claimed hundreds of lives and stands to claim two more -- - lives very precious to Ty and his Topsider ally, Gemma.

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. Morgan le Fay will make Jack and Annie masters of the tree house if only they can solve four riddles -- which will take four books, of course! Dolphins at Daybreak begins the third set of four books in this magical (and increasingly popular) series! Jack and Annie are off in the Magic...

The secret explorers jump into action to save a pod of humpback whales, but when Connor and Roshini's submarine malfunctions, the explorers could be the ones in trouble.

"Let's go on a submarine and cruise beneath the sea, discovering strange creatures who swim so fast and free. Toddlers with enjoy this simple rhyming text with vivid illustrations"--Back cover

"A scientific team has boarded the submarine Oceanos to explore the ocean's depths. Suddenly, it gets caught in a violent storm, causing it to drift thousands of miles off-course. From the glittering surface of the sea to the darkness of the abyss, Deep in the Ocean takes readers on a bewitching journey through fascinating waters--some warm, colorful, and crowded with sea creatures, others mysterious and turbulent. Six colors of ink (including neon...