Why do people climb mountains, scramble up rocky crags, use iceaxes and crampons to ascend steep ice? Are climbers risk loving men or women, impervious to cold and hardship, and somewhat different to ordinary people? Ross Cullen argues in Slice of Heaven that he and his climbing companions are, like most climbers, everyday people who pursue careers, support families and contribute to their communities. They are also drawn to make ascents of crags, chasms, mountains, even Himalayan peaks. Micro-adventure is a modern name for outdoor activities that many people, like the author, fit in around...