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“Although I’m famous for coming clean, I’ve never really come clean,” Susan Cheever told More magazine. Her new book, Note Found in a Bottle, is her third memoir. She’s written before about her famous father and her mother, but this is her first public self-portrait. By the book’s end, she has indeed come clean and emerged sober, but not before detailing her protracted assumption of her family’s other legacy: alcoholism. In a series of pithy vignettes, Cheever is alternately wry and bemused as she revisits her journey from Ivy Leaguer drowning the sorrows of First Love lost, to hard-drinking sophisticate (she berates second-husband-to-be Calvin Tomkins for choosing the wrong aperitif), to voyeur-in-denial accompanying her father to AA meetings, and, finally, to newly faithful mother of two. Her greatest success is in illustrating that it isn’t just talent that runs in families. Cheever reads from and signs copies of Bottle at 7 p.m. at Politics & Prose, 5015 Connecticut Ave. NW. Free. (202) 364-1919. (Daniel Searing)