Quantum AI is one of today's most rapidly growing fields, which has attracted enormous attention from not only research scientists but also the public and press. However, hitherto there is no such a book that introduces quantum AI to readers in a relatively comprehensive and up-to-date way. In particular, a comprehensive text book at the graduate level or higher with exercise problems for quantum AI is highly desirable, given that more and more universities/colleges begin to open quantum AI-related courses and more and more students and researchers become interested in this interdisciplinary field. Quantum Artificial Intelligence aims to fill this gap.