Book 5 - NOC - Northern Cave
The NOC is north of the CAV. "This part of the cave looks like a high dome. Above you, stalactites hang from the walls. The acoustics here are extraordinary. Even quiet sounds swell to a threatening volume due to the reverberation."
Printed name of the NOC is "Northern Cave".
The tiny key is in the NOC.
Initial appearance of the tiny key is "At an unreachable height, a tiny key hangs from a thread tied to a stalactite."
Instead of taking the tiny key when the tiny key is not handled, say "You can not reach it.".
Instead of making noise in the noc when the tiny key is not handled:
say "You make a big noise and the echo swells the noise more and more. Some stalactites detach from the ceiling and crash to the ground. Between the debris of the stalactites lies the tiny key.";
now the tiny key is handled.