First Lensman by E. E. Smith
Publisher: Pyramid Publications 1964
ISBN/ASIN: 0515046876
Number of pages: 252
The enemy spacefleet arrowed toward the armored mountain -- nerve center of the Galactic Patrol. The Patrol battle cruisers swerved to meet them, and a miles-long cone of pure energy ravened out at the invaders, destroying whatever it touched.
Science Fiction & Fantasy Science Fiction Military SF