This open access book makes quantum computing more accessible than ever before. A fast-growing field at the intersection of physics and computer science, quantum computing promises to have revolutionary capabilities far surpassing classical computation. Getting a grip on the science behind the hype can be tough at its heart lies quantum mechanics, whose enigmatic concepts can be imposing for the novice. brThis classroom-tested textbook uses simple language, minimal math, and plenty of examples to explain the three key principles behind quantum computers superposition, quantum measurement, and entanglement. It then goes on to explain how this quantum world opens up a whole new paradigm of computing. brThe book bridges the gap between popular science articles and advanced textbooks by making key ideas accessible with just high school physics as a prerequisite. Each unit is broken down into sections labelled by difficulty level, allowing the course to be tailored to the student's experien