Thompson Heller Detective Interstellar #2

Thompson Heller, a private detective who travels the stars solving cases that have political or moral intrigue, travels to a mining planet to investigate the assassination of Elbee, an android leader of a civil rights organization for robots' rights - and also one of Heller's oldest friends. Plunged into grief over the loss, Heller, a renowned atheist, is consoled by his intellectual sparring partner Bahvi, a religious scholar and spiritual icon. As the two of them unravel the case, their romance at once deepens and grows ever more complicated.