BY JOHN WILKENS Camp David is a name known to many Americans, but what happens there isn't. The Coronado author, a retired Navy rear admiral, pulls back the curtain on his time at the presidential retreat under President Bill Clinton and George W. Bush. 6 p.m. Oct. 24, 6 p.m. Coronado Library, 640 Orange Ave. Free. Via Bay Books: (619) 435-0070 or baybookscoronado.com. Also, Oct. 25 at 7:30 p.m. at Warwick's.