Think you might be haunted? Local psychic Ruth Berger knows the warning signs: an inexplicably cold area in your house, mysterious sounds like knocking or banging or someone calling your name, and TVs and radios that pop on by themselves. Shaking beds are a sign, but only if you’re sleeping. If you have a sudden chill, feel queasy, dizzy, and out of balance, it’s either the flu or a message from the other side. And if someone you care about has been killed or knocked themselves off, and you find yourself overwhelmed by fear–well, boo!–somebody wants to contact you. Berger, who also reads auras by mail (send her a photo and $14.95; she’ll throw in a book), says she resisted conversing with ghosts for years because she was afraid of them, but when the spirits began to interrupt her stand-up shows, she gave in. Now she’s written a new book, They Don’t See What I See: How to Talk With Loved Ones Who Have Crossed Over, a manual she claims will demonstrate “how almost anyone can learn to listen to the voices that might be trying to reach them from beyond.” She’ll talk about it at 2 on Saturday, October 26, at Borders Books and Music, 7100 Forest Preserve Dr. in Norridge (708-457-2111). She’ll materialize at the Borders at 15260 S. La Grange Rd. in Orland Park (708-460-7566) at 7:30 on Tuesday, October 29. Both programs are free.