Cover art by Chris Foss (Panther Science Fiction, 1972).
Gray Lensman is also known as Grey Lensman.
Gray Lensman was serialized in 4 parts in Astounding Science-Fiction between 1939 and 1940.
Kimball Kinnison is made an independent agent, subject to nobody's orders, and sets out on the trail of more Boskonian trouble. He returns to Arisia for advanced treatment, and becomes the first Second Stage lensman, with new and remarkable mental powers.
E. E. Smith (1890–1965), also Edward Elmer Smith, Ph.D., E. E. "Doc" Smith, Doc Smith, "Skylark" Smith, and (to family) Ted, was a food engineer (specializing in doughnut and pastry mixes) and early science fiction author who wrote the Lensman series and the Skylark series, among others. He is sometimes referred to as the father of Space Opera.
E. E. Smith. Wikipedia.