ECONOMICS ABROAD John Perkins discusses and signs his book “Confessions of an Economic Hit Man” (Penguin), about his experiences working secretly for the National Security Agency. Tonight, 7 p.m., Barnes & Noble Astor Place, 4 Astor Place at Broadway, 212-420-1322, free.

U.E.S. UNDERBELLY Michele Martinez signs her new mystery novel, “The Finishing School” (Morrow), which finds two Upper East Side schoolgirls murdered in a drug scandal. Tomorrow, 6 p.m., Black Orchid Books, 303 E. 81st St., between First and Second avenues, 212-734-5980, free.

FREE FROM FEAR Gregory Thomas discusses and signs his book “Freedom From Fear: A Guide to Safety, Preparedness, and the Threat of Terrorism” (Random House), which offers advice on creating an emergency plan, reducing anxiety, and talking to children about terrorism. Tomorrow, 6 p.m., Hue-Man Bookstore, 2319 Frederick Douglass Boulevard at 125th Street, 212-665-7400, free.

HARTE OF GOLD Barbara Taylor Bradford signs her new novel “Just Rewards” (St. Martin’s), the final book in her series following heroine Emma Harte and her descendents. The series began with the 1979 best seller “A Woman of Substance.” Tomorrow, 6:30 p.m., Coliseum Books, 11 W. 42nd St., between Fifth and Sixth avenues, 212-803-5890, free.

WONKETTE IN PRINT Ana Marie Cox, also known as the Washington blogger Wonkette, reads from and signs her first novel, “Dog Days” (Penguin). It follows a campaign staffer for a Democratic presidential candidate as she negotiates the difficulties of romance and work in D.C. Tomorrow, 7 p.m., Barnes & Noble Astor Place, 4 Astor Place at Broadway, 212-420-1322, free.

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