Jack and Annie continue their quest for the secrets of happiness in order to save Merlin. This time, the Magic Tree House takes them to the one continent they haven't visited before: Antarctica. Illustrations.

太空狗麦克斯的宇宙探索系列一部 一条罗威纳犬要加入人类全新月球探索任务的队伍！ 一条地球狗迈向月球需要分几步？ 作为一条登月的狗狗，麦克斯和宇航员们又会遇到哪些趣事？ 书里模拟了真实的太空探险，让孩子们在幻想旅行中获取天文宇宙知识，跟着狗狗麦克斯一起发现月球的奥秘！

Water is all around us; we drink it every day. In this level 3 reader, kids will learn about the water cycle, discovering how rain and snow flow into our lakes, rivers, and oceans, and later evaporate into the sky again. Vivid photography and accessible text make this book an ideal introduction to the science of water.

What's that buzzing around? It's a busy bee! With beautiful, engaging, and authentic photos, and accessible text, kids will learn all about these incredible insects in this level 2 reader.

Readers will be inspired by the amazing story of Helen Keller in this informative biography. They will learn all about her life, her achievements, and the challenges she faced along the way. The Level 2 text provides accessible, yet wide-ranging, information for independent readers.

Take a dip with turtles in this exciting reader. Packed with beautiful and engaging photos, kids will learn all about these fantastic reptiles. This level 1 reader is carefully leveled for an early independent reading or read aloud experience, perfect to encourage the scientists and explorers of tomorrow!

Fans of Disneyland, Disney World, and all things Disney are sure to enjoy learning all about the fascinating founder, Walt Disney. This new biographic reader reveals the interesting, enchanting life of one of the world's most beloved storytellers and entrepreneurs. Level 3 text provides accessible yet wide-ranging information for fluent readers.

Explore the African savanna with giraffes in this exciting reader. Packed with beautiful and engaging photos, kids will learn all about these amazing animals. This level 1 reader is carefully leveled for an early independent reading or read aloud experience, perfect to encourage the scientists and explorers of tomorrow!

Trucks lift, dump, and carry things every day, everywhere. Didyou know that... .Some trucks can weigh as much as ten elephants puttogether. .Flatbed trucks can carry other trucks, houses, and even a spaceshuttle! .Semitrailer cabs can have a bed behind the front seat so thatdrivers can pull over and rest on long trips. .Road-train trucks pull multiple trailers at the same time, justlike a locomotive pulls freight cars on a train.

Branley explains these powerful storms in simple terms youngchildren can understand. He describes the funnel cloud and how itforms and [tells] what to do during a tornado. The book ends on acomfortable note, that the idea is not to panic but to know what todo to ensure safety.

Meet Pope Francis. Born Jorge Mario Bergoglio in Buenos Aires, Argentina, Pope Francis is the first Pope from the Americas. He's also the first Pope to replace a living one! Learn all about the Pontiff in this level 1 reader, carefully leveled for an early independent reading or read aloud experience.

Morgan le Fay will make Jack and Annie masters of the tree house if only they can solve four riddles. Dolphins at Daybreak begins the third set of four books in the magical series, as Jack and Annie embark upon solving riddle number three in a whole new world under the ocean!.

The monarch butterfly, one of the most seemingly delicate ofall of nature’s animals, proves to be one of the toughest in thisreader. Making the yearly trip from the Northern United States andCanada to the Oyamel forest of Mexico is no easy task, and it takesfive generations of butterflies in order to do so. Battling coldtemperatures and the threat of starvation, these beautiful insectscomplete an almost 3,000 mile journey over the course of twomonths, only to have to turn and around and head back home.

You can start with one little hamster and keep counting pastsix slinky fish, eight favorite playmates, and more -- all the wayup to ten cuddly teddy bears. With buddies, counting is fun!

The Magic Tree House transportss Jack and Annie to the freezingArctic. There, they must solve the final riddle to become masterlibrarians. But it's not going to be easy--especially when theyhave cracking ice, a seal hunter, and a prodigious polar bear todeal with. Will they be able to solve the riddle before they geticed themselves?

The O'Malleys are off to the beach! But it's a long, hot, boringdrive. What can Eric, Bridget, and Nell do to keep busy? Play tallygames, of course -- counting up all the gray cars or green T-shirtsthey see. Whoever has the most marks at the end wins thegame. Eric wins the first game. Bridget wins the second. It seems likepoor Nell will never win a game! But Nell has the luck of the Irishon her side, and a surprise in store for her big brother andsister.

Sometimes, the uglier, the better! In this level 2 reader, young readers will meet the ugliest of animals. Follow these funny-looking creatures and learn how their strange looks help them in the wild. Interesting photos and carefully leveled text make this book perfect for reading aloud or for independent reading.

Exceptional nonfiction for children from two of the mosttrusted names in science education: Seymour Simon and theSmithsonian Institution.