This straightforward guide introduces the newcomer to the core theoretical principles and therapeutic strategies of Rational Emotive Behaviour Therapy (REBT). Starting with the ABC model of emotion popularized by Albert Ellis from the outset when he developed his approach to CBT, the guide then shows how REBT distinguishes between unhealthy and healthy negative emotions. From there it outlines the four irrational attitudes theorized to be at the core of emotional and behavioural disturbance. Finally, the newcomer to REBT will develop an appreciation for how REBT inoculates clients against future problems and teaches them to maintain and extend their treatment gains. This Newcomer’s Guide will be a useful contribution to counsellors and psychotherapists in training, either in Rational Emotive Behaviour Therapy or another cognitive-behavioural approach.