Doors: Twilight

When his beloved only daughter goes missing, millionaire entrepreneur Walter van Dam calls in a team of experts - including free-climbers, a geologist, a parapsychologist, even a medium - to find her . . . for Anna-Lena has disappeared somewhere within a mysterious cave system under the old house the family abandoned years ago. But the rescuers are not the only people on her trail - and there are dangers in the underground labyrinth that no one could ever have foreseen. In a gigantic cavern the