In “Love and Consequences,” a critically acclaimed memoir published last week, Margaret B. Jones wrote about her life as a half-white, half-Native American girl growing up in South-Central Los Angeles as a foster child among gang-bangers, running drugs for the Bloods. The problem is that none of it is true. Margaret B. Jones is a pseudonym for Margaret Seltzer, who is all white and grew up in the well-to-do Sherman Oaks section of Los Angeles, in the San Fernando Valley, with her biological family. She graduated from the Campbell Hall School, a private Episcopal day school in the North Hollywood...