"Gray Lensman" by E. E. Smith is a science fiction novel first serialized in 1939 and published in book form in 1951. The fourth book in the Lensman series follows Kimball Kinnison as he discovers that destroying Helmuth's base may not have ended the threat of Boskone. Pursuing clues across galaxies, Kinnison infiltrates a deadly drug network, faces torture and dismemberment, and leads increasingly dangerous missions. With romance blooming and civilization's fate hanging in balance, he must deploy devastating new weapons against mysterious enemies in the Second Galaxy. (This is an automatically generated summary.)