A frantic mother, who has been separated from her nine-year-old daughter, Melanie, for six years, strives to rescue her from the people who have been subjecting her to terrifying psychological experiments.

This newly repackaged Koontz classic–one of his best-loved novels of psychological suspense–features a new Afterword by Koontz that examines what this book means to him 25 years after he first wrote it.

The Door to December is a spine-chilling horror/thriller novel that will keep you on the edge of your seat. The story follows a mother's desperate search for her daughter, who has been taken by her ex-husband and subjected to a terrifying experiment. As the mother delves deeper into the mystery, she uncovers a dark and disturbing world of scientific experimentation and psychological manipulation.