By D.A. Ball
Updated May 20, 1994 at 04:00 AM EDT

”My life has been filled with hypocrisy and deception from the moment I was born.” Judy Lewis says she found out in her 30s that she was the love child of Loretta Young and Clark Gable. She describes her childhood under the cover-up in Uncommon Knowledge, including agonizing surgery to disguise her telltale Gable ears, and braces to correct the baby teeth that jutted out like Loretta’s. Told she came from an orphanage, little Judy was obsessively good so she wouldn’t be sent back. She writes stirringly of meeting Gable when she was 15, long before learning he was her father. She may make too much of commonplace growing-up problems (like being punished for smoking), but a child in torment doesn’t distinguish between trivia and trauma. Of special worth: wonderful photographs scattered through the text (not jammed in the center) that make turning each new page a delight. A