Quantum mechanics is a hugely important topic in science and engineering, but many students struggle to understand the abstract mathematical techniques used to solve the Schroedinger equation and to analyse the resulting wave functions. Retaining the popular approach used in Fleisch's other student's guides, this friendly resource uses plain language to provide detailed explanations of the fundamental concepts and mathematical techniques underlying the Schroedinger equation in quantum mechanics. It addresses the problems students find most troublesome in a clear and intuitive way, and each chapter includes several homework problems with fully worked solutions. A companion app from Edukado hosts additional resources, including an extensive glossary, quick quizzes, interactive graphs and a series of videos in which the author explains the most important concepts from each section of the book. The supporting app enables students to test their learning and develop a deeper understanding of the topic.