Blue Monday was long ago exposed as a PR stunt, a construct cooked up to sell holidays. But the third Monday of January still brings with it a glut of depression-themed news stories. So perhaps it is a good moment to consider psychotherapy’s complex relationship with depression, which is not immune to marketplace influences. Stephen Barton, co-author of a new book about CBT for depression, thinks a reorientation of focus is necessary. If therapists are to help address the worldwide growth in depression, he argues, we need to stop dwelling on our treatment ‘successes’ – and start putting more energy into considering our ‘failures’.