The name of the library is a reference to HP Lovecraft's
mythical dwelling place of the Great Ones.
"
There were towers on that titan mountaintop; horrible domed towers in
noxious and incalculable tiers and clusters beyond any dreamable
workmanship of man; battlements and terraces of wonder and menace,
all limned tiny and black and distant against the starry pshent that
glowed malevolently at the uppermost rim of sight. Capping that most
measureless of mountains was a castle beyond all mortal thought, and
in it glowed the daemon-light.
"