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 neighborhood. She has never lived with a foster family, nor did she run drugs for any gang members. Nor did she graduate from the University of Oregon, as she had claimed.

Riverhead Books, the unit of Penguin Group USA that published “Love and Consequences,” is recalling all copies of the book and has canceled Ms. Seltzer’s book tour, which was scheduled to start on Monday in Eugene, Ore., where she currently lives.

In a sometimes tearful, often contrite telephone interview from her home on Monday, Ms. Seltzer, 33, who is known as Peggy, admitted that the personal story she told in the book was entirely fabricated. She insisted, though, that many of the details in the book were based on the experiences of close friends she had met over the years while working to reduce gang violence in Los Angeles.