If any contemporary author deserves to wear the mantel of Jane Austen, it's Goodman, whose subtle, astute social comedies perfectly capture the quirks of human nature. This dazzling novel is Austen updated for the dot-com era, played out between 1999 and 2001 among a group of brilliant risk takers and truth seekers. Still in her 20s, Emily Bach is the CEO of Veritech, a Web-based data-storage startup in trendy Berkeley. Her boyfriend, charismatic Jonathan Tilghman, is in a race to catch up at his data-security company, ISIS, in Cambridge, Mass. Emily is low-key, pragmatic, kind, serene—the polar opposite of her beloved younger sister, Jess, a crazed postgrad who works at an antiquarian bookstore owned by a retired Microsoft millionaire. When Emily confides her company's new secret...