"Memory Man" is a novel written by David Baldacci that features the character Amos Decker, a former football player with a unique condition called hyperthymesia. This condition allows him to remember every detail of his life, making him an exceptional detective. The story begins when Decker witnesses a brutal murder in his hometown, prompting him to use his extraordinary memory to solve the case. As Decker investigates, he uncovers a web of secrets and lies that challenge his understanding of the people around him. The novel explores themes of memory, justice, and the impact of the past on the present, making it a gripping read for fans of the mystery genre.