If you enjoy Carolyn Haines "Bones" series, you'll love Penumbra. Set in the south in the 60s, it keeps you guessing right till the end. The social climate plays a big part without over-shadowing the story. Jade is a very likeable character and I hope we hear more from her.
I don't particularly like thrillers, I don't even like mysteries because they are all normally written the same. This, however knocked my socks off. Where has Carolyn Haines been all my life? I am just blown away by her writing. She took something so usually boring and cliché and turned into a spine tingling, OMG what is going to happen next kind of story. There are so many stories inter-tangled with each other and that worked out beautifully. I am defiantly looking forward to more of her writing.