Asta's son has no name. And, after the death of his mother, no family to protect him when he is accused of a crime he didn't commit. Declared a 'wolf's head' - meaning that anyone who catches him can kill him - he has no choice but to leave his village. All he can take with him on the journey is his newly revealed name - Crispin - and his mother's cross of lead. Travelling without purpose, through a countryside still ravaged by the effects of the plague, Crispin stumbles upon a juggler, giant of a man known as Bear. Crispin becomes Bear's servant but the juggler is a stange master offering both protection and encouraging Crispin to think for himself. But Crispin is not safe and it becomes clear he is being relentlessly pursued. Why are his enemies so determined to kill him? Will the lessons Bear has taught him be enough to safeguard all that he now holds so dear... Avi brings the full force of his storytelling powers to the world of medieval England.

A 2003 Newbery Award winner for his book Crispin : The Cross of Lead, Avi is one of the foremost children's and young adults' authors read in the classroom today.

When his father is killed fighting for the Union in the War Between the States, thirteen-year-old Tom Carroll must take a job to help support his family. He manages to find work at a bustling ironworks in his hometown of Brooklyn, New York, where dozens of men are frantically pounding together the strangest ship Tom has ever seen. A ship made of iron. Tom becomes assistant to the ship's inventor, a gruff, boastful man named Captain John Ericsson. He soon learns that the Union army has very important plans for this iron ship called the Monitor. It is supposed to fight the Confederate "sea monster"--another ironclad--the Merrimac. But Ericsson is practically the only person who believes the Monitor will float. Everyone else calls it "Ericsson's Folly" or "the iron coffin." Meanwhile, Tom's position as Ericsson's assistant has made him a target of Confederate spies, who offer him money for information about the ship. Tom finds himself caught between two certain dangers: an encounter with murderous spies and a battle at sea in an iron coffin

From the winner of the Turing Award and the Abel Prize, an introduction to computational complexity theory, its connections and interactions with mathematics, and its central role in the natural and social sciences, technology, and philosophy Mathematics and Computation provides a broad, conceptual overview of computational complexity theory—the mathematical study of efficient computation. With important practical applications to computer science and industry, computational complexity theory has evolved into a highly interdisciplinary field, with strong links to most mathematical areas and to a growing number of scientific endeavors. Avi Wigderson takes a sweeping survey of complexity theory, emphasizing the field’s insights and challenges. He explains the ideas and motivations leading to key models, notions, and results. In particular, he looks at algorithms and complexity, computations and proofs, randomness and interaction, quantum and arithmetic computation, and cryptography and learning, all as parts of a cohesive whole with numerous cross-influences. Wigderson illustrates the immense breadth of the field, its beauty and richness, and its diverse and growing interactions with other areas of mathematics. He ends with a comprehensive look at the theory of computation, its methodology and aspirations, and the unique and fundamental ways in which it has shaped and will further shape science, technology, and society. For further reading, an extensive bibliography is provided for all topics covered. Mathematics and Computation is useful for undergraduate and graduate students in mathematics, computer science, and related fields, as well as researchers and teachers in these fields. Many parts require little background, and serve as an invitation to newcomers seeking an introduction to the theory of computation. Comprehensive coverage of computational complexity theory, and beyond High-level, intuitive exposition, which brings conceptual clarity to this central and dynamic scientific discipline Historical accounts of the evolution and motivations of central concepts and models A broad view of the theory of computation's influence on science, technology, and society Extensive bibliography

When he moves from Los Angeles to Providence, Rhode Island, Kenny discovers that his new house is haunted by the spirit of a black slave boy who asks Kenny to return with him to the early nineteenth century and prevent his murder by slave traders.

#1 Amazon Best Seller in Mystery & Detective #1 Amazon Best Seller in Science Fiction History & Criticism 2023 American Book Fest’s American Fiction Awards Finalist in Science Fiction 2022 Global Book Award’s Gold Medal Winner in Science Fiction Romance ​​​​​​​2022 Readers’ Favorite Honorable Mention in Time Travel Fiction “An engaging SF [sic] tale whose cause-effect plotline takes a licking and keeps on ticking.”—Kirkus Reviews “Avi Datta spins an intricate and inventive sci-fi narrative that engages the mind and merges several interesting themes... The Winding does a fantastic job of portraying the emotions and thoughts of the protagonist through comprehensive internal dialogue.” —The Manhattan Book Review “An intelligent, transporting time-travel tale brimming with music, ideas, emotion, imagination, and possibility. This is a stunner.” —The BookView Review Would you change reality for love? Morally complex, orphan, and absolute genius Vincent Abajian is hellbent to uncover all he can on Artificial Intelligence. His relentless pursuit distracts him from a traumatic childhood loss—his childhood best friend Akane was engulfed in a time-turbulence, a random rift in space and time. But when a beautiful, temperamental, post-doctoral scientist, Emika Amari, joins his Center, everything changes. Vincent is convinced that Akane is inside the irresistible Emika. As they begin a life together, Vincent’s past and his connection with a time turbulence survivor challenge everything they’ve created and push them into a spiral of politics and conspiracy. Vincent’s silence to protect Emika threatens to tear them apart. Unknowingly, Emika is torn between what she wants and what Akane wants from her. With his newfound power, Vincent struggles with whether or not he should create another time-turbulence to free Emika from the grasp of Akane once and for all. But will tinkering with time be more destructive than anything he has ever encountered before?

Newbery Medalist Avi explores the American Revolution from a fresh perspective in the story of a young Loyalist turned British spy navigating patriotism and personal responsibility during the lead-up to the War of Independence. When his father is killed by rebel vigilantes, Noah flees with his family to Boston. Intent on avenging his father, Noah becomes a spy for the British and firsthand witness to the power of partisan rumor to distort facts, the hypocrisy of men who demand freedom while enslaving others, and the human connections that bind people together regardless of stated allegiances. Awash in contradictory information and participating in key events leading to the American Revolution, Noah must forge his own understanding of right and wrong and determine for himself where his loyalty truly lies.