This study guide covers the key information necessary to pass Paper A of the postgraduate examination to become a member of the Royal College of Psychiatrists (MRCPsych). Established resources for preparing for MRCPsych exams are often from a range of sources, online or through questions banks. This essential guide provides balance to the breadth and depth of the syllabus, in an accessible format that can be used for brief fact checking or understanding of a topic as a whole. Authors draw on their own experience of passing Paper A to emphasise key learning points with concise text, visual memory aids, diagrams and tables. It is a novel presentation of the Paper A syllabus in a focussed and portable source for pre-exam revision.