Engineers are the superheroes of the real world. They use their problem-solving skills to face down the biggest challenges we have, from creating clean energy to designing prosthetic limbs, from eliminating food shortages to programming AI to exploring the surface of Mars. In this book you'll meet 46 engineers, from apprentices and lab technicians to university professors and start-up CEOs and hear what problems they are solving and why they love their jobs. Engineers are changing the world. Will you be one of them?