Edmond Hamilton's Crashing Suns, in its first book appearance. A collection of stories set in a common background - these are the "Interstellar Patrol" stories which first appeared in Weird Tales 1928 to 1930.

Crashing Suns
The Star Stealers
Within the Nebula
The Comet Drivers
The Cosmic Cloud.

From mighty Canopus, capital of the Federated Stars, to the outer fringes of our galaxy, the Interstellar Patrol was on the watch. Rogue suns, marauding alien intelligences, man-made comets driven by their makers for the conquest of unsuspecting worlds, diabolical conspiracies hatched in the depths of unmapped nebulas - it was the business of the Patrol's mighty spaceships to guard against such cosmic dangers. Volunteers from a thousand worlds man the mighty starcraft of a hundred thousand years to come. This is space opera - like they used to write.