A little later in the 80's and not necessarily dealing with the PDP-8, but there's The Cuckoo's Egg, which is a first-person account of the hunt for a computer

A little later in the 80's and not necessarily dealing with the PDP-8, but there's The Cuckoo's Egg, which is a first-person account of the hunt for a computer hacker who broke into a computer at the Lawrence Berkeley National Laboratory (LBNL). https://en.wikipedia.org/wiki/The_Cuckoo%27s_Egg_(book) https://en.wikipedia.org/wiki/The_Cuckoo%27s_Egg_(book)