Gray Lensman - Lensman, Bk 4 Author:E. E. 'Doc' Smith Space Duel to the Death. Somewhere among the galaxies was the stronghold of Boskone - a network of brilliant interplanetary criminals whose mania for conquest threatened the future of all civilization. But Where? Boskanian bases dotted the universe - shielded by gigantic thought-screens that defied penetration. It was up to Lensman Kim Kinnison ... more »using his fantastic mental powers, to infiltrate the Boskonian strongholds and learn the location of the enemy's Grand Base - and smash it forever! « less