This title in the ALA "Booklist" Top Ten Nonfiction series explains one of the most fundamental concepts of physics in simple terms, exploring such forces as momentum, velocity, and gravity. Full color.

An exceptionally moving story of triumph against all odds set during World War 2, from the acclaimed author of "Jefferson's Sons" and for fans of "Number the Stars."
Nine-year-old Ada has never left her one-room apartment. Her mother is too humiliated by Ada's twisted foot to let her outside. So when her little brother Jamie is shipped out of London to escape the war, Ada doesn't waste a minute--she sneaks out to join him.
So begins a new adventure of Ada, and for Susan Smith, the woman who is forced to take the two kids in. As Ada teaches herself to ride a pony, learns to read, and watches for German spies, she begins to trust Susan--and Susan begins to love Ada and Jamie. But in the end, will their bond be enough to hold them together through wartime? Or will Ada and her brother fall back into the cruel hands of their mother?
This masterful work of historical fiction is equal parts adventure and a moving tale of family and identity--a classic in the making.

A New York Times bestseller Like the classic heroines of Sarah, Plain and Tall, Little Women, and Anne of Green Gables, Ada is a fighter for the ages. Her triumphant World War II journey continues in this sequel to the Newbery Honor-winning The War that Saved My Life When Ada awakes from surgery on her club foot, the news that greets her will change the course of her life. Doors that her mother had shut tightly are swinging open- But World War II rages on. Ada and her brother, Jamie, are forced to move into a cottage with the iron-faced Lady Thorton and her daughter, Maggie. Life in the crowded home is tense. Then Ruth arrives. Ruth, a Jewish girl, from Germany. A German? Could Ruth be a spy? As the fallout from the war intensifies, calamity creeps closer to Ada's doorstep, and life grows more complicated. Who will Ada decide to be? How can she keep fighting? And who will she struggle to save? Ada's first story, The War that Saved My Life, was a #1 New York Times bestseller and won a Newbery Honor, the Schneider Family Book Award, and the Josette Frank Award, in addition to appearing on multiple best-of-the-year lists. This second masterwork of historical fiction continues Ada's journey of family, faith, and identity, showing us that real freedom is not just the ability to choose, but the courage to make the right choice. "Honest . . . Daring." -The New York Times "Stunning." -The Washington Post "Ada is for the ages-as is this book. Wonderful." -Kirkus, starred review "Fans of the first book will love the sequel even more." -SLJ, starred review "Bradley sweeps us up . . . even as she moves us to tears." -The Horn Book, starred review "Perceptive . . . satisfying . . . will stay with readers." -PW, starred review "Beautiful." -HuffPost

Did you know that energy comes from the food you eat? From the sun and wind? From fuel and heat?

You get energy every time you eat. You transfer energy to other things every time you play baseball. In this book, you can find out all the ways you and everyone on earth need energy to make things happen.

Nine-year-old Ada has never left her one-room apartment. Her mother is too humiliated by Ada’s twisted foot to let her outside. So when her little brother Jamie is shipped out of London to escape the war, Ada doesn’t waste a minute—she sneaks out to join him.

So begins a new adventure of Ada, and for Susan Smith, the woman who is forced to take the two kids in. As Ada teaches herself to ride a pony, learns to read, and watches for German spies, she begins to trust Susan—and Susan begins to love Ada and Jamie. But in the end, will their bond be enough to hold them together through wartime? Or will Ada and her brother fall back into the cruel hands of their mother?

"A teenager transforms from a schoolgirl to a spy in this true story of heroism in wartime.
"Suzanne David's everyday life is suddenly shattered in 1940 when a bomb drops on the main square of her hometown, the city of Cherbourg, France, killing a pregnant neighbor right in front of her. Until then the war had seemed far away, not something that would touch her or her teenage friends. Now Suzanne's family is kicked out onto the street as German soldiers take over their house as a barracks.
Suzanne clings to the one thing she really loves--singing. Her voice is so amazing that she is training to become an opera singer. As Suzanne travels around for rehearsals, cosume fittings, or lessons, she learns more about what the Nazis are doing and about the people who are "disappearing." Her travels are noticed by someone else, an organizer of the French Resistance. Soon Suzanne is a secret courier, a spy fighting for France and risking her own life for freedom.

"From the Hardcover edition."

Why are soap bubbles always round? Why do they always go "Pop " A simple, clear text explains the basic science behind an activity every child loves. Vivid photographs capture both the fragile beauty of soap bubbles and the delight they give to children. A recipe for bubble solution and suggested activities (can you blow a square bubble?) will let readers conduct their own experiments in the science of soap bubbles.