For fans of Wrinkle in Time and The School of Good and Evil, the New York Times bestseller The Mark of the Dragonfly is a fast-paced adventure story about a mysterious girl and a fearless boy, set in a magical world that is both exciting and dangerous. Piper has never seen the Mark of the Dragonfly until she finds the girl amid the wreckage of a caravan in the Meteor Fields. The girl doesn’t remember a thing about her life, but the intricate tattoo on her arm is proof that she’s from the Dragonfly Territories and that she’s protected by the king. Which means a reward for Piper if she can get the girl home. The one sure way to the Territories is the 401, a great old beauty of a train. But a ticket costs more coin than Piper could make in a year. And stowing away is a difficult prospect—everyone knows that getting past the peculiar green-eyed boy who stands guard is nearly impossible. Life for Piper just turned dangerous. A little bit magical. And very exciting, if she can manage to survive the journey. Praise for The Mark of the Dragonfly: ★ “This magnetic middle-grade debut…[is] a page-turner that defies easy categorization and ought to have broad appeal.”—Publishers Weekly, Starred ★ “Heart, brains, and courage find a home in a steampunk fantasy worthy of a nod from Baum.”-- Kirkus Reviews, Starred ★ “A fantastic and original tale of adventure and magic...Piper is a heroine to fall in love with: smart, brave, kind, and mechanically inclined to boot.”—School Library Journal, Starred “A complex and impeccably developed plot—there is plenty to recommend in this novel.”—The Bulletin “Appealing characters and lots of action make it a good choice for young adventure readers.”—Booklist

A 2021 Coretta Scott King Honor Book! Winner of the 2020 National Book Award for Young People's Literature! Winner of the 2020 Boston Globe-Horn Book Award for Fiction and Poetry! In a small but turbulent Louisiana town, one boy's grief takes him beyond the bayous of his backyard, to learn that there is no right way to be yourself. FOUR STARRED REVIEWS! Booklist School Library Journal Publishers Weekly The Horn Book Twelve-year-old Kingston James is sure his brother Khalid has turned into a dragonfly. When Khalid unexpectedly passed away, he shed what was his first skin for another to live down by the bayou in their small Louisiana town. Khalid still visits in dreams, and King must keep these secrets to himself as he watches grief transform his family. It would be easier if King could talk with his best friend, Sandy Sanders. But just days before he died, Khalid told King to end their friendship, after overhearing a secret about Sandy-that he thinks he might be gay. "You don't want anyone to think you're gay too, do you?" But when Sandy goes missing, sparking a town-wide search, and King finds his former best friend hiding in a tent in his backyard, he agrees to help Sandy escape from his abusive father, and the two begin an adventure as they build their own private paradise down by the bayou and among the dragonflies. As King's friendship with Sandy is reignited, he's forced to confront questions about himself and the reality of his brother's death. The Thing About Jellyfish meets The Stars Beneath Our Feet in this story about loss, grief, and finding the courage to discover one's identity, from the author of Hurricane Child.

From the acclaimed author of the New York Times bestseller The Mark of the Dragonfly comes another magical and thrilling tale that takes readers on an exciting new adventure. Perfect for fans of Wrinkle in Time! Lina Winterbock lives in the mountain strongholds of Solace. She’s an apprentice to the archivists and should be spending her days with books, but the Iron War has changed everything—it’s too chaotic to study. The strongholds are now a refuge, so instead of learning about how to preserve the objects that mysteriously fall from the sky, she whiles away her time exploring the hidden tunnels and passages of her home. And in one of the forgotten chambers, Lina discovers a secret. Hidden deep in a cavern is a half-buried airship like nothing she has ever seen before. Then she meets Ozben, a mysterious boy who has a secret of his own—a secret that’s so dangerous it could change the course of the Iron War and the world of Solace forever. Praise for Jaleigh Johnson’s The Secrets of Solace ★ “Highly recommended for those who have finished with Harry and are too young for Katniss.” —SLJ, Starred “An engaging world rich in detail, mayhem, and adventure. . . . All aboard for fantasy lovers with a dual penchant for girl power and keeping up with the Indiana Joneses.” —Kirkus Reviews Praise for Jaleigh Johnson’s The Mark of the Dragonfly ★ “This magnetic middle-grade debut . . . [is] a page-turner that defies easy categorization and ought to have broad appeal.” —Publishers Weekly, Starred ★ “Heart, brains, and courage find a home in a steampunk fantasy worthy of a nod from Baum.” —Kirkus Reviews, Starred ★ “A fantastic and original tale of adventure and magic. . . . Piper is a heroine to fall in love with: smart, brave, kind, and mechanically inclined to boot.” —SLJ, Starred

Entrenched secrets, mysterious spirits, and an astonishing friendship weave together in this extraordinary and haunting debut that School Library Journal calls “a powerful story about loss and moving on.” Nothing matters. Only Bird matters. And he flew away. Jewel never knew her brother Bird, but all her life she has lived in his shadow. Her parents blame Grandpa for the tragedy of their family’s past: they say that Grandpa attracted a malevolent spirit—a duppy—into their home. Grandpa hasn’t spoken a word since. Now Jewel is twelve, and she lives in a house full of secrets and impenetrable silence. Jewel is sure that no one will ever love her like they loved Bird, until the night that she meets a mysterious boy in a tree. Grandpa is convinced that the boy is a duppy, but Jewel knows that he is something more. And that maybe—just maybe—the time has come to break through the stagnant silence of the past.

Dragonflies are among the most ancient of living creatures – few insect groups fascinate as much or are more immediately recognisable.

This outstanding monograph presents a critical review of information, published and unpublished, worldwide, on the behaviour and ecology of dragonflies in all stages of the life cycle for both physical and biotic environments. Information about tropical and temperate species in functional and evolutionary contexts is skilfully integrated and facts and ideas are reviewed in the context of current biological thinking. The book includes more than 4,000 bibliographical entries, and concludes with indexes to authors, taxa and subjects. Unrevised Brill edition. Originally published with imprint Harley Books, ISBN 9780946589777

Hailed as a "must-have textbook" (CHOICE, January 2010), the first edition of Game Engine Architecture provided readers with a complete guide to the theory and practice of game engine software development. Updating the content to match today’s landscape of game engine architecture, this second edition continues to thoroughly cover the major components that make up a typical commercial game engine. New to the Second Edition Information on new topics, including the latest variant of the C++ programming language, C++11, and the architecture of the eighth generation of gaming consoles, the Xbox One and PlayStation 4 New chapter on audio technology covering the fundamentals of the physics, mathematics, and technology that go into creating an AAA game audio engine Updated sections on multicore programming, pipelined CPU architecture and optimization, localization, pseudovectors and Grassman algebra, dual quaternions, SIMD vector math, memory alignment, and anti-aliasing Insight into the making of Naughty Dog’s latest hit, The Last of Us The book presents the theory underlying various subsystems that comprise a commercial game engine as well as the data structures, algorithms, and software interfaces that are typically used to implement them. It primarily focuses on the engine itself, including a host of low-level foundation systems, the rendering engine, the collision system, the physics simulation, character animation, and audio. An in-depth discussion on the "gameplay foundation layer" delves into the game’s object model, world editor, event system, and scripting system. The text also touches on some aspects of gameplay programming, including player mechanics, cameras, and AI. An awareness-building tool and a jumping-off point for further learning, Game Engine Architecture, Second Edition gives readers a solid understanding of both the theory and common practices employed within each of the engineering disciplines covered. The book will help readers on their journey through this fascinating and multifaceted field.