E. E. 'Doc’ Smith 
Children of the Lens [EPUB ebook] 

Book 6 of the Lensman series. Galactic Co-ordinator Kimball Kinnison finished his second cup of Tellurian coffee, got up from the breakfast table, and prowled about in black abstraction. Twenty-odd years had changed him but little. He weighed the same, or a few pounds less; although a little of his mass had shifted downward from his mighty chest and shoulders. His hair was still brown, his stern face was only faintly lined. He was mature, with a conscious maturity which no young man can know.

Epic space opera awates.