I love sci-fi, and this didn’t disappoint. Hannah, the heroine and a not-quite-human girl, is a runner. Her father, a researcher and genetics engineer, altered her genes in utero, and basically she’s a sort of super-runner designed for speed and distance. But she’s not the only ‘designer human’ – in fact, the world is divided now into the “Alts” (or altered humans) and the “Saps”, (or unaltered humans – the ordinary, good old homo sapiens). Humans being what they are, there was a brief but bloody war where Alts fought Saps and destroyed the A.I.’s in the process. The A.I.’s were computer bugs come to life, and I guess they were collateral damage in what came to be known as “The Stupid War”. They are also illegal now, having evolved into sentient beings and causing humans to feel threatened. The book starts off up when Hannah goes to an exclusive private school with a superlative running team and meets a beautiful unaltered human, Devon. Never having made a friend, she’s amazed and flattered when Devon takes an interest in her, and befriends her. She also meets the handsome and rather mysterious Jordan – a coach for the running team, unaltered human, and unabashedly gay. The story is told from several points of view: Hannah; Hannah’s social dropout, nerdy father; Devon, an unaltered human and fiercely competitive runner; and Jordan – member of one of the wealthiest families on the planet, whose father is fanatically against the Alts. Each person has a different, engaging voice and the story flows easily and quickly from start to finish. I loved the science behind the story, and the philosophy that humans will fight each other over their differences, no matter what they are is an interesting one. The way the author tries to solve the problem is nothing short of astounding and very, very funny. I highly recommend this book for anyone ages 16 and up.