E. E. ‘Doc’ Smith 
First Lensman [EPUB ebook] 

Virgil Samms has a dream. He wants to establish the Galactic Patrol to protect civilization from the forces of evil. Samms is guided to Arisia, a previously unapproachable planet, where he is greeted by a benevolent and telepathic Arisian who presents him with a Lens. It gives its wearer the ability to communicate telepathically with any being or animal with a mind. The Lens underlies all the remaining stories in the series. Samms is charged with locating all Lens worthy individuals and directing them to Arisia to have their own Lens bestowed upon them.
Samms and his team seek out corruption and evil wherever it may be. But before they can they must face a dangerous foe on their home world who means to keep power by any means necessary.