Baseball Card War by William Mathis
Approx. 80,320 words.
Published on March 6, 2013.
Private detective Derek Sprye slowly gets sucked into a serial murder case without realizing he's at risk of being killed. The blatant clues the assassin leaves could have multiple meanings, though the victims are all men who gamble using baseball cards. While investigators are confused, perhaps the killer is as well. Is he making tragic mistakes while vengefully hunting a man who is already dead?