J. Schimmelpenninck Volgorde van de boeken (chronologisch)

Seeking the immortality promised in an ancient manuscript, The Book of Skulls, four friends, college roommates, go on a spring break trip to Arizona: Eli, the scholar, who found and translated the book; Timothy, scion of an American dynasty, born and bred to lead; Ned, poet and cynic; and Oliver, the brilliant farm boy obsessed with death. Somewhere in the desert lies the House of Skulls, where a mystic brotherhood guards the secret of eternal life. There, the four aspirants will present themselves–and a horrific price will be demanded. For immortality requires sacrifice. Two victims to balance two survivors. One by suicide, one by murder. Now, beneath the gaze of grinning skulls, the terror begins. . . .

Colonel Morton was sent to Diamondia to report on the war between Earth-descended colonists and the guerilla warriors of the inhuman Irsk. Because something was going terribly wrong - a darkness was setting in, mental confusion was epidemic, and there was evidence of outside interference. The Darkness was impartial, and Morton's encounters with it were the most disturbing events of his career. For it seemed as if the Outside were deliberately stirring up the planetary pot, mixing minds with minds, and personalities with personalities. But when Morton realized that the only solution might be to find and use the incalculable power of the Lositeen Weapon, he realized also that the decision was too great for any one man - even for all men together - to make. It is loosely based on the short story "Humans, Go Home!" from 1969.