Title: Lensman from Rigel
First published: 1982
Description: From the back cover:

An assassin's attack has nearly killed Second Stage Lensman Tregonsee, the brilliant telepathic intelligence chief of the Galactic Patrol.  Their forces in disarray, the Rigellian super-brain and a rookie Tellurian Patrolman named D. D. Cloudd plan a desperate shell game to avert intergalactic devastation.