Color of Deception — Ruth J. Hartman

When artist Kitty Sullyard draws a strange symbol in her toy panorama, she doesn't expect it to be life threatening. Tossed into a situation she never asked for, she learns the hard way who not to trust. After Kitty mysteriously disappears, Nathaniel Bexley has only a single clue with which to find her. It's something only he would know. Will he be able to decipher the secret message she's hidden in a drawing, or will Kitty be doomed to the hands of her kidnappers?