Nulltron, the AI butler.
Activate the holographic interface by gesturing over the table, revealing a detailed 3D map of the mansion that could pinpoint Nulltron's control nodes. Carefully examine the blueprint for any hidden compartments or unusual layouts.Pulling the tilted book carefully activates a hidden mechanism, causing the bookcase to slide open and disclose a secret, dimly lit passage stretching into the mansion's depths.Open the doors or drawers of the vibrating bookcase, methodically checking for any concealed devices or objects responsible for the low hum.Head to the far corner of the library where a concealed control panel lies behind an old painting, and attempt to hack into Nulltron's system to wrestle back control of the mansion.