Dan Lyons’s book Disrupted is an often-delightful tour through startup culture, based on the author’s experience working at online marketing firm HubSpot. Despite taking the faux-curmudgeonly attitude of an anthropologist exploring the strange world of business dudes — is a sales funnel really that much of a novelty? — Lyons’s dissection of the startup world is warmly humorous far more often than it’s coldly cynical.