Life sentences

Author Cassandra Fallows has achieved remarkable success by baring her life on the page. Her two widely popular memoirs continue to sell briskly, acclaimed for their brutal, unexpurgated candor about friends, family, lovers—and herself. But now, after a singularly unsuccessful stab at fiction, Cassandra believes she may have found the story that will enable her triumphant return to nonfiction.When Cassandra was a girl, growing up in a racially diverse middle-class neighborhood in Baltimore, her best friends were all black: elegant, privileged Donna; sharp, shrewd Tisha; wild and worldly…