Frozen Rage — Bernard J. Taylor

A newly elected Texas Congressman is found dead in his hotel room in bizarre circumstances immediately after being given a civic reception in his former hometown outside San Antonio. At first he is thought to have accidentally killed himself while indulging in autoerotic asphyxiation. But Newman begins to suspect that he has been murdered. His suspicions eventually lead him to Michael Vickers, a reclusive software designer who has been nursing a grudge against the Congressman for nearly twenty years, and who obsessively keeps records of everyone who has offended him since his school days. While following the progress of the investigation, the book also follows Vickers' progress, as he plans revenge against others who have crossed his path and as he reluctantly begins to fall in love.