Chase had stuck around to help Basil with re-sorting some of the books and making sure that nothing else was out of the ordinary. At some point some maintenance workers show up with some equipment that they seem woefully unfamiliar with, taking some readings and generally hmming and hrmming at the strange clone-stamped wood. Finally they take some measurements and take off again, leaving Basil and Chase to handle the confused trickle of students coming in. Most of the day passes without anything out of the ordinary happening. The two do find some more books that are where they're not supposed to be, adding to the normal workload, keeping them pretty busy.
Eventually they get ready to close up for the evening, Chase up on one of the ladders putting away some final books while Basil sorts things out behind the counter. As they're going about their business a tiny line, thinner than a strand of hair and only at all visible to the detached observer because it occasionally catches a bit of light, reflecting it with a metallic glint. The thin line slithers across the floor and splits in two, branching as one half moves towards the counter while the other disappears further into the library.
As Basil is scanning some last minute returns the metal strand reaches the counter and begins sliding up the vertical surface, then upside down when it reaches the lip of the countertop, following it until it sits on top.
At the same time the second strand has made it to the ladder Chase is balanced on top of and begins spiraling up one of the rails.
Both strands simultaneously begin to glow at one end, the light racing along it's length and gathering at the tip. Over and over spots of light travel up along it as it gathers in an increasingly bright droplet. And with each pulse the foremost of the strand of nanites surges in size. From speck to mote to actually identifiable as a little robot, more or less spherical in shape and holding a glowing orb in it's little manipulator arms. The light flickers with strange motes drifting off of it and collapsing back in, almost like bubbles in soda.
The little robots chirp strangely at Chase and Basil respectively. And then the bubbling light shoots out and spills over them, blinding them and accompanied by a strange sensation of falling lurching through their stomachs.
.
.
.
.
.
And once the initial daze has worn off and mote no longer dance in their eyes Basil finds himself standing on a strange square space, surrounded by chasms with identical grey square mesas around him. Right underneath his foot is a thick black line that, after taking a step back, reveals itself to be a giant letter 'G'
Chase on the other hand finds the sensation of falling to persist for a moment until he reflexively catches himself on a wooden edge, fingers digging into the rough, cragged surface and finding decent grip while beneath him a series of plateaus disappear into the distance like steps on a giant's staircase.