‘The drawer beside Roberta’s bed contained remnants of other people’s fun’: so begins ‘Mathematics’, one of 11 stories in this outstanding collection by the Belfast author Wendy Erskine. The opening is Erskine in miniature: the wry, unostentatious prose; the sad interiors with their charged objects (‘a small mother-of-pearl box inlaid with gold, a lipstick that was a stripe of fuchsia, a lucky charm in the shape of a dollar sign’); a character’s casual curiosity about the intimate affairs of others.