Presents an account of the fundamental topics of theoretical physics from the viewpoint of imagination and beauty.

A simple act of kindness brings two unlikely friends together in this profound picture book about the transformative power of friendship. A bear sits in his quiet, colorless home in a forgotten place. He feels invisible; no one comes to see him, and he spends his days alone. Then someone moves in next door. Madame Odette is sound and sunshine, and at first, the bear isn't sure about this colorful new neighbor. But through an act of kindness, the bear and the Madame Odette meet, and as time goes by, they become friends. And in the end, they are both forever changed by the gifts they bring each other. The first book from author-illustrator Cécile Metzger, The Invisible Bear is a powerful and beautiful meditation on the beauty of friendship and how two people can save each other just by being themselves.

A moving, powerful story that shines a light on those that feel invisible in our world - and shows us that we ALL belong - from the author of Ruby's Worry. The Invisible is the story of a young girl called Isabel and her family. They don't have much, but they have what they need to get by. Until one day, there isn't enough money to pay their rent and bills and they have to leave their home full of happy memories and move to the other side of the city. It is the story of a girl who goes on to make one of the hardest things anyone can ever make...a difference. And it is the story of those who are overlooked in our society - who are made to feel invisible - and why everyone has a place here. We all belong.

Twenty-seven-year-old Sarah The barge had it all - a loving boyfriend, an Ivy League degree, and a successful career - when her life was derailed by an unthinkable diagnosis: aggressive breast cancer. After surviving the grueling treatments - though just barely - Sarah moved to Portland, Oregon to start over. There, a chance encounter with an exhausted African mother and her daughters transformed her life again. A Somali refugee whose husband had left her, Hadhi was struggling to raise five young daughters, half a world a way from her war-torn homeland. Alone in a strange country, Hadhi and the girls were on the brink of starvation in their own home, "invisible" to their neighbors and to the world. As Sarah helped Hadhi and the girls navigate American life, her outreach to the family became a source of courage and a lifeline for herself. Poignant, at times shattering, Sarah The barge's riveting memoir invites readers to engage in her story of finding connection, love, and redemption in the most unexpected places.

If no one sees him, does he exist? This superhero-inspired adventure story with short comics between each chapter explores friendship and what it means to be truly brave. Nadia looks for adventure in the pages of her Superman comic books, until a mysterious boy saves her dog from drowning during a storm and then disappears. Now she finds herself in the role of Lois Lane, hunting down the scoop of the Invisible Boy. Suddenly she’s in a real-life adventure that’s far more dangerous than anything in her comic books. The Invisible Boy is a mystery and an adventure story, as well as a story about child labor trafficking. Like Katherine Applegate, author of Crenshaw and Wishtree, Alyssa Hollingsworth takes a difficult subject matter and makes it accessible for middle-grade readers. Featuring illustrations by Deborah Lee

All the Powerful Invisible Things is an eloquent memoir of self-discovery and a chronicle of outdoor life. Refusing “impoverished ideas of passion,” Gretchen Legler writes about the complexities of being a woman who fishes and hunts, as well as about the more intimate terrain of family and sexuality. The result is a unique literary confluence filled with the ineffable graces of the natural world. She writes: “I used to hate being a woman. When I was young, I believed I was a boy. Throughout college I never knew what it was like to touch a woman, to kiss a woman, to have a woman as a friend. All of my friends were men. I am thirty years old now, and I feel alone. I am not a man. Knowing this is like an earthquake. Just now all the lies are starting to unfold. I don’t blend in as well or as easily as I used to. I refuse to stay on either side of the line.” Like many women, Legler finds that her presence identifies the unmarked boundaries of where she is and is not welcome, learning when it is advantageous to pass as male and when it is better to disappear into the woods and trees around her. This contrasts sharply with her experience of nature as a source of spiritual sustenance, a space of unparalleled freedom where she can lose herself in something larger. Twenty-five years after it was first published, All the Powerful Invisible Things remains a highwater mark for women writing about the outdoors and is one of the few works to tackle the intricacies of gender identity and sexuality with transcendental aplomb.

A fascinating and thoroughly modern glimpse of world knowledge. It offers a deeper, more ranging look at the world and its history, and an entirely democratic, global look at key issues bedded into the foundations of world knowledge - from questions and facts on history and politics to science, literature and more.