Skylark Books in Order

Scientist Richard Seaton discovers a force capable of powering interstellar travel, but a ruthless rival wants the secret. When Seaton's fiancee and friends are kidnapped, his pursuit carries them across the galaxy toward unfamiliar civilizations.

Richard Seaton's allies on Kondal face devastating attacks, while the Fenachrone threaten conquest across the galaxy. As Seaton seeks ways to counter these enemies, his rival DuQuesne pursues a dangerous mission of his own.

Exploring distant space, Richard Seaton and his companions encounter disembodied intelligences in a realm where time and matter behave strangely. Their human minds must confront invisible enemies whose powers challenge the explorers' understanding of the universe.

An invasion from beyond the galaxy forces lifelong enemies Richard Seaton and Marc DuQuesne into an uneasy alliance. Fighting beside his ruthless rival, Seaton must defend humanity while watching for the betrayal that could undo their efforts.