What Maisie Knew is a novel by Henry James, first published as a serial in the Chap-Book and (revised and abridged) in the New Review in 1897 and then as a book later that year. The story of the sensitive daughter of divorced, irresponsible parents, What Maisie Knew has great contemporary relevance as an unflinching account of a wildly dysfunctional family. The book is also a masterly technical achievement by James, as it follows the title character from earliest childhood to precocious maturity.