Sleepwalking Into Darkness by Eric Praschan

The James women's story continues, with more history being revealed.

Tony & Cindy have married and now live in Arkansas and have a daughter, Lexi. Things are well and Tony has been asked to do an interview with Psychology Today. He is departing for that interview when he leaves a pink envelope for Cindy.

Cindy opens the envelope and finds a letter to her from her mother. Her mother has asked he to look into the chess set that Cindy brought from the mansion. Inside the chess set she finds a white envelope that contains two postcards, a photograph, a letter and a silver key.

In the photograph is a blond haired girl. On the back of the photo is FIND HER AND SAVE HER. One of the postcards is of the Ozark Mountains and the other postcard is "Lookout Mountain".
The letter states that there is something buried under the house that Cindy grew up in in Chattanooga, TN. Her mother wants Cindy to find "her" from the photograph.

Tony, Cindy & Lexi travel to Tennessee and discover the identity and learn more secrets of the James women.

Eric Praschan left this one making you really wanting to read the last book of the trilogy, The Reckoning.

http://www.ericpraschan.com/