Jack spends his days sailing the sea and taking in nets full of half-dead fish, ignoring the polluted condition of the water, until he finds an ailing seal and receives a message from the sea itself about its sorry state.

The #1 bestselling chapter book series of all time celebrates 25 years with new covers and a new, easy-to-use numbering system! Jack and Annie are off on another mythical mission at the request of Merlin the magician. Luckily, they have a young sorcerer, Teddy, to help them. From underwater caves to a Spider Queen, from mystical selkies to a magical sword, this is a Magic Tree House adventure kids won’t want to miss! Formerly numbered as Magic Tree House #31, the title of this book is now Magic Tree House Merlin Mission #3: Summer of the Sea Serpent. Did you know that there’s a Magic Tree House book for every kid? Magic Tree House: Adventures with Jack and Annie, perfect for readers who are just beginning chapter books Merlin Missions: More challenging adventures for the experienced reader Super Edition: A longer and more dangerous adventure Fact Trackers: Nonfiction companions to your favorite Magic Tree House adventures

Jack spends his days sailing the sea and taking in nets full of half-dead fish, ignoring the polluted condition of the water, until he finds an ailing seal and receives a message from the sea itself about its sorry state.

The U.S Navy SEALs were created in the 1960s as an elite team to fight along the rivers and coastline of Vietnam. Since that time, the SEALs have become the world's best at surviving and operating at sea. They are some the foremost fighters the American military has in its arsenal, able to engage any enemy, at any time, in any conditions. Come inside this top military unit, exploring what it takes to become a SEAL, as well as the dangers of the missions these highly skilled soldiers carry out. This book explains the history of the SEALs, including the creation of the unit and the first Navy SEAL ever to serve in the U.S. military. Also learn about: • How the SEALs helped contain communism during the Cold War. • What each recruit must go through in order to become part of the Navy SEALs. • The techniques the SEALs use to survive at sea. • SEAL tactics for remaining undetected when completing missions on land.

This 100th Anniversary Edition presents the timeless tale of Humphrey Van Weyden, pressed into service aboard the seal-hunting Ghost, led by the brutal, enigmatic captain Wolf Larsen. This volume also includes four of London's acclaimed short stories.

Jack spends his days sailing the sea and taking in nets full of half-dead fish, ignoring the polluted condition of the water, until he finds an ailing seal and receives a message from the sea itself about its sorry state.

"It's been twenty years since 9/11, two decades since the United States was attacked on home soil and set out to make the guilty pay with their lives. In the shadows, the enemy has been patient--learning, and adapting. And the enemy is ready to strike again. A new president offers hope to a country weary of conflict. He's a young, popular, self-made visionary...but he's also a man with a secret. Halfway across the globe a regional superpower struggles with sanctions imposed by the United States and her European allies, a country whose ancient religion spawned a group of ruthless assassins. Faced with internal dissent and extrajudicial targeted killings by the United States and Israel, the Supreme Leader puts a plan in motion to defeat the most powerful nation on earth. Meanwhile, a young PhD student has gained access to a bioweapon thought to be confined to a classified military laboratory known only to a select number of officials. A second-generation agent, he has been assigned a mission that will bring his adopted homeland to its knees."--Back cover.

Jack and his siblings hit the high seas to solve the mystery of a sabotaged renewable energy project in another thrilling adventure in this New York Times bestselling series from Bill Nye and Gregory Mone! Jack and his genius siblings, Ava and Matt, embark on an adventure with Dr. Hank Witherspoon to the remote Hawaiian island home of Ashley Hawking, a technology billionaire. Hawking and engineer Rosa Morris have built a revolutionary electricity plant that harvests energy from the ocean’s depths, but someone has sabotaged the project. In his search for the culprit, Jack ventures 2,000 feet below the surface of the ocean in a homemade submarine. He, Ava, and Matt attend the world’s strangest birthday party, face off against an arrogant young genius, and then find themselves lost at sea. The three siblings have to use all their brainpower and cunning to find out who’s behind the sabotage . . . and survive. In the Jack and the Geniuses series, readers join Jack, Ava and Matt on adventures around the world to tackle some of science's biggest challenges, including new ways to create clean drinking water, to generate clean and renewable energy, and to extend information access to the entire planet. Each book in the series includes cool facts about the real-life science found in the story and a fun DIY project.

Jack spends his days sailing the sea and taking in nets full of half-dead fish, ignoring the polluted condition of the water, until he finds an ailing seal and receives a message from the sea itself about its sorry state.