"I Think I Love You" is a major new novel by a writer who understands the female psyche, and observes the male with a wary eye. It's a coming-of-age novel, set in the '70s and the present day, about teen obsession, rites of passage and one girl's infatuation with David Cassidy. It's about love in many forms, but first love in particular, how it shapes us and imprints us. Allison Pearson is a writer of finesse, humanity and humour, and her second novel is funny, clever, moving and immensely readable.