"People are always talking about the weather. We want to know if it will be warm or cold, sunny or rainy. This helps us decide what to wear. It also helps us plan what to do. Another reason we talk about the weather is because it is always changing. It can be sunny when we wake up but pouring down rain by lunch time. People who study the weather are called meteorologists. One of the most important things meteorologists study is weather fronts. A weather...

Though the Greek and Roman crewmembers of the Argo II have made progress in their many quests, they still seem no closer to defeating the earth mother, Gaea. Her giants have risen -- all of them -- and they're stronger than ever. They must be stopped before the Feast of Spes, when Gaea plans to have two demigods sacrificed in Athens. She needs their blood -- the blood of Olympus -- in order to wake. The demigods are having more frequent visions of...

"Mason and Ty were once the very best of friends, like two nerdy sides of the same coin . . . until seventh grade, when Ava Petrakis came along. Now Mason can trace everything bad in his life to that terrible fight they had over the new girl. The one thing he'd give anything for is a do-over. But that can't happen in real life--can it? As a science kid, Mason knows do-overs are impossible, so he can't believe it when he wakes up from a freak accident...

Eighth-grader Emily Lemon wakes up and discovers that none of the gadgets around her house are working properly, and the computers at her middle school seem to have a mind of their own--but when the scoreboard in the gym displays the words "the revolution has begun, down with humanity" she realizes that humanity has lost control and civilization as we know it is in serious trouble.

When fifteen-year-old Iranian American Marjan discovers her murdered father was secretly a veterinarian to magical creatures, she realizes she must take up his mantle, despite the many dangers.

"When Rafe Khatchadorian goes on a trip to Alaska, he's in for a blundering adventure that includes building igloos, racing across icebergs, and coming face-to-face with a polar bear."--

Harry is in his fifth year at Hogwarts as the adventures continue. There is a door at the end of a silent corridor. And it's haunting Harry Potter's dreams. Why else would he be waking in the middle of the night, screaming in terror? Harry has a lot on his mind for this, his fifth year at Hogwarts: a defense against the dark arts teacher with a personality like poisoned honey; a big surprise on the Gryffindor Quidditch team; and the looming terror...

From the book: "It's on our watch that amphibians are checking out. I think we ought to be very concerned about that." Frogs are found everywhere: from the tropics to north of the Arctic Circle, from the heights of the Himalayan Mountains to the driest deserts. Frogs live on every continent except Antarctica. They live part of their lives in water and part on land. Frogs absorb moisture and even breathe through their skin. Unfortunately, their skin...