HealthTim Spector's guide to fermentation is meticulous and persuasive We know fermented foods do us good, but the ZOE founder's new book still surprises with fascinating facts - and avoids feeling like an ad for his gut supplements, says Helen Thomson Culture
HumansProvocative new book says we must persuade people to have more babies The population is set to plummet and we don't know how to stop it, warn Dean Spears and Michael Geruso in their new book, After the Spike Culture