@carkner @Mab_813 @secretgeek
fire personnel typically know the buildings in their "first in" area.
Firefighters would already know that that building was a hazard:
access and egress is restricted due to all the aisles being full of books.
There is no good way for a firefighter in full turnouts and SCBA to navigate those aisles without knocking stuff over and possibly cutting off their exit route. Then... add dragging a fully charged fire hose through those stacks. Not gonna work.
Once you start adding water to that? Those books become water logged and heavy - shelves may fail.
Heck, if those shelves aren't sturdy and well secured? a stream of water out of a fire hose might be enough to knock those shelves down. - again, another firefighter entrapment issue.
So firefighters would already know the building's risks. No firefighters would be inside that building.
As you know paper burns quickly, and would produce a lot of smoke: it's usually the smoke that kills people not the actual fire itself.