207 pp. "Stellar exploration and galactic war--Skylark battles an alien terror. Osnome. The first of the mighty Skylark spacecraft took Dick Seaton and Mart Crane on a fantastic tour of the Galaxy and to the strange planet of Osnome. Skylark Two returned them to Earth. Now, in this next adventure, they voyage again to Osnome to meet the deadly threat of war. One the way, in the deeps of space, Seaton and Crane meet an alien spaceship. From it they discover a danger more deadly and immediate than any planetary battle. In a desperate race to mobilize the scientific talent of a score of planets, Seaton makes himself into a "superman" of knowledge and drives toward his goal of building the greatest spaceship of all time--Skylark Three!"
