Parts of this book were published before 1965 as separate titles.

1. Tiger by the Tail (1951)

2. The Warriors from Nowhere (1954)

3. Honorable Enemies (1951)

4. Hunters of the SkyCave, also known as A Handful of Stars and We Claim these Stars (1960)

Flandry, here a captain, undergoes a series of adventures: He is abducted by the Scothians, an alien race hoping to invade the Terran Empire; rescues the Emperor’s kidnapped granddaughter; meets Aycharaych, his nemesis in league with the Merseians; and investigates a previously unencountered alien race that has invaded the distant colonial world of Vixen.