The Lost Areas Map is behind a locked door on the bookstore's second floor, in the room next to the coffee shop. You need a shiv to open it.
The map marks the parts of Pittsburgh's quarantine zone the military has lost.
Read with the Lost Hill note, it shows the army steadily losing ground until the rebels held the city.
Abandon Zone Note
The Abandon Zone Note sits on the desk in the office at the far left end of the bookstore's first floor in Pittsburgh.
Accretion
Accretion, issue 6 of Savage Starlight, sits on a coffee table in a lounge on the second floor of the Hotel Grand, during the Hotel Lobby section of Pittsburgh.
Ambush Map
The Ambush Map is pinned to the wall of the room at the end of the hallway. Leave the stairs in the room with the two dead bodies, follow the corridor to its end and look on the wall.
Applicant Checklist
The Applicant Checklist is under the stairs on the far left of the bookstore's ground floor in Pittsburgh.