The cosy promise is simple: low stakes and high warmth. A cosy crime novel still has a body, but the violence happens offstage, the detective is usually a sharp-witted amateur, and the real pleasure lies in community, humour and a puzzle solved without trauma. Nothing too dreadful is allowed to linger, and order is always restored by the final page. Cosy fantasy applies the same logic to dragons and magic, swapping epic battles for found family, slow afternoons and the small triumphs of ordinary life. The roots run deep. Agatha Christie’s Miss Marple, solving murders from her armchair in St Mary Mead, is the gentle ancestor of the whole tradition. What unites the two genres is a quiet rebellion against the relentless grimness of so much modern storytelling, a faith that warmth can grip a reader as firmly as dread.