Sigma Force novels

Twenty years after a wealthy British financier disappears near the site of a lost fabled city, the man's daughter leads an expedition of scientists in search of the city, which harbors a powerful but dangerous energy source with the potential to both fuel and destroy the planet.

An ancient relic, a murdered man, an international think tank of scientists known as the Jasons who have discovered a way to bioengineer autistic children, and a plot to wipe out a quarter of the world's population have two men racing against time to solve a mystery that dates back to the first famous oracle of history--the Greek Oracle of Delphi.

Sigma Force stalwarts Painter Crowe and Commander Grayson Pierce must investigate a gruesome massacre in the Rocky Mountains and root out a secret cabal that has been manipulating momentous events since the time of the original thirteen colonies.

Commander Gray Pierce and Sigma Force set out to discover a truth tied to the fall of the Roman Empire, to a mystery going back to the birth of Christianity, and to a weapon hidden for centuries that holds the fate of humanity.

A series of strange events throws the world into turmoil. As a manned Chinese rocket explodes upon launch, three American astronauts, each separated by thousands of miles, are murdered. Then an archaeologist in Croatia uncovers a new cavern system that reveals elaborate primitive paintings by a tribe of Neanderthals. The artwork, painted in blood, illustrates an immense battle between the Neanderthals and frightening shadowy figures. Who is the ancient...

The members of Sigma Force reluctantly join forces with their most hated enemy to stop a primordial threat with ties to the American Civil War and the secret work of Alexander Graham Bell.

For eons, the city of Troy--whose legendary fall was detailed in Homer's Iliad--was believed to be myth, until archaeologists in the nineteenth century uncovered its ancient walls buried beneath the sands. If Troy was real, how much of Homer's twin tales of gods and monsters, curses and miracles--The Iliad and The Odyssey--could also be true and awaiting discovery? In the frozen tundra of Greenland, a group of modern-day researchers stumble on a shocking...

"The Titan Project—an international research station off the coast of Australia—discovers a thriving zone of life in an otherwise dead sea. The area teems with a strange bioluminescent coral that defies science, yet holds great promise for the future. But the loss of a military submarine in the area triggers a brutal attack and sets in motion a geological disaster that destabilizes an entire region. Massive quakes, volcanic eruptions, and deadly...