The Mandie and the Long Good-Bye: Book 30 by Lois Gladys Leppard
With only a few days left of her Christmas holidays with Joe, Sallie, Jonathan, and Polly at the Shaw house, Mandie is shocked to hear that a turkey has been stolen from Aunt Lou's oven in broad daylight. Whoever would do such a thing, and where have they taken it? Might is still be hidden in the house? Mandie and her friends begin the search for the missing turkey, but instead of solving the mystery, they uncover another mystery, and then another, and another. No matter how hard they try, they can't see, to solve any of them. But when Dr. Woodard disappears, things get very serious and dangerous! Still nothing can chase away the pain that Mandie knows is coming!