I love Amos Decker. Aka the Memory Man. Walk the Wire is his 6th outing and he and his work partner, Alex Jamison contemplate here how far he’s come socially since they met.
Decades earlier—after almost dying—Decker developed hyperthymesia. Not only is he unable to forget anything but it kinda destroyed his social skills. The remainder of his will to live / ability to feel joy disappeared after the murder of his family.