Patti Callahan Henry, "Coming Up for Air." 7 p.m. Aug. 18. Talk, signing. Free. Eagle Eye Book Shop, 2076 N. Decatur Road, Decatur. 404-486-0307, http://eagleeyebooks.com. Also appearing: 1 p.m. Aug. 20. Signing. Free. Foxtale Book Shoppe, www.foxtalebookshoppe.com.

Engaging fare from Callahan (“Between the Tides,” “The Perfect Love Song”) about a woman trapped in a dying marriage. At the funeral of her controlling mother, Lillian, Ellie discovers that her ex-boyfriend is making a documentary that involved Lillian before her death. As they dig into Lillian’s past together, a secret diary offers a window into a long-buried love story  -- as well as a second chance for Ellie.

Lisa Unger, "Darkness, My Old Friend." 7:15 p.m. Aug. 17. Talk, signing. Free. Decatur Library Auditorium, 215 Sycamore St., Decatur. 404-370-8450, Ext. 2225; www.georgiacenterforthebook.org.

Past and future collide in a new thriller by the author of “Beautiful Lies” and “Fragile.” The story returns to the Hollows, backdrop for ”Fragile,” for a complex tale about a retired police detective, a caver whose mother disappeared 25 years ago, and a teenager whose habit of running away leads her to a dark discovery that ties all three characters together.

Ray Nagin, "Katrina's Secrets: Storms After the Storms." 7 p.m. Aug. 18. Talk, signing. Free. Carter Presidential Library & Museum Theater, 441 Freedom Parkway, Atlanta. 404-865-7100, www.jimmycarterlibrary.gov.

The former New Orleans mayor’s long-awaited account lays out the days leading up to and following Hurricane Katrina’s landfall, with exacting detail and information that until now has been glossed over -- or spun out. Now he tells all about thousands pleading for rescue, politicos more keen to pose than provide solutions, broken promises from the Federal Emergency Management Agency, and the violence at the Superdome.

Johnny Diaz, "Take the Lead." 7:30 p.m. Aug. 18. Signing. Free. Outwrite Books, 991 Piedmont Ave. N.E., Atlanta. 404-607-0082, www.outwritebooks.com.

In the latest from Diaz (“Miami Manhunt”), popular college professor Gabriel Galan is living the good life in Boston. But when he agrees to help his stubbornly independent father manage his Parkinson's disease, Gabriel gets more than he bargained for, including a crush on his father's physical therapist.