Once she's found the library buildings, she's going to circle around them and try to get an idea of whether there's a main entrance or any signage. Starting there and checking with a librarian about whether she's allowed to just start reading the books or if she needs a library card sounds like a good first step.

A bit of looking near where the library structure meets the mountain will reveal a large stone landing pad, with a blue signboard standing against the cliff wall at one side of it and a tunnel next to that leading into the mountain; the mouth of the tunnel is flanked by blue monoliths. To the other side of the sign there's a smaller opening with a hematite-grey flap covering it.

Language!

Weeping Cherry carefully examines the sign to see if she can pick out different glyphs. How is the writing arranged? How many distinct glyphs are there? Are they joined up by a line or written separately?

The sign contains thirty-two glyphs, divided into six sections, each with a circle around it; the fifth circle contains a round patch of hematite-grey and there's two slots about the width of a sheet of paper, one rimmed in grey and the other rimmed in blue, plus another circular grey patch, below the sixth one. Many of the glyphs are also inside smaller circles inside the main ones, with markings around the edges of many of the inner circles; there are seven different kinds of circle edge markings present. The glyphs themselves are mostly moderately complex, suggesting that each one might be a word, with a few of them being markedly more complex and drawn a little larger to accommodate that; within each outer circle the glyphs are arranged roughly in horizontal lines. The most common glyph is present four times.

In particular they're arranged as follows, with parentheses for circles, G for glyphs, cG for especially complex glyphs, and M for circle markings:

(G1, G2, (G3)-M1)

(G4, G5, ((G6, G7, G8), (G9, G10))-M2)

((G11)-M3, cG1, G5, (G12)-M4)

((G11)-M3-M4, cG2, G13, G14)

(G15, G6, G16, G17 (on hematite circle), (cG3, cG4)-M5)

(((G5, G18), (G17, (G19)-M6))-M7, G13, G20, G6, G21)

Weeping Cherry spends a while puzzling over this. The circles give very clear groupings, which is nice. She's fairly certain that each large circle contains something like a single statement. The complexity of the glyphs suggests that the writing system is possibly ideographic, which is going to be a pain but makes sense if they use telepathy instead of a spoken language.

She spends a moment trying to see if there are any rules she can figure out for what order glyphs appear in, but ultimately she doesn't think the sign is big enough to infer anything. She guesses that the more complex glyphs are names or proper nouns, but that doesn't really give her enough to go on.

Based on the coloring, she's going to guess that statement 5 has to do with the hematite flap. Probably grey is a 'neutral' or 'public' color, and blue is a library color?

The blue monoliths flanking the entrance look like claim markers. How big is the hematite flap? Does it look more like a book deposit, or like somewhere that the local humanoids could fit through?

It's a bit bigger and particularly more square than the type of aperture you'd see used as a book deposit at a library on Earth, more like a laundry chute. A smallish humanoid child might be able to fit into it, or a crow if they had help keeping the flap up, but even a slender adult would have a hard time.

Probably that means that the flap is not an entrance. She'll call that plan B, because while there are probably books in there, going through a space not meant for people seems more hostile than going through an open door, even one that requires you to be a ... library patron? Something like that.

She slides down the tunnel, keeping an eye out for additional signage or anything that looks like a circulation desk or a librarian.

The tunnel only goes a few feet in, and then curves to the side and meets a door. Made of crafting material, of course.

Of course. Does it have a latching mechanism of some kind? Or are people expected to shape the door open and closed?

There's a handle, yes.

In that case, she'll try scaling the surface of the door and sitting just under the handle. Can she twist the handle at all? Is it made of discrete parts, and if so, what does the interior of the mechanism look like?

The handle isn't a separate piece from the door and doesn't turn. The door itself does shift a bit when she climbs it; it might not be latched shut at all.

She slides back down to where the door meets the floor, and tries tugging it.

It's hard to get started, the floor under the hinge seems to be slanted to encourage the door to stay closed, but she can pull it open with some effort.

Oh, that's a clever design! She'll pull the door partly open, scoot around to the other side, and then close it behind her. What does the area inside look like?

Friendlier! The ceiling is lined with glowing crafting material, the floor is padded, and the walls are done up in sky blue with realistic-looking clouds, with handrails in a slightly darker blue. The corridor goes a little ways deeper into the mountain, perhaps another ten feet or so, before splitting into a T intersection; there's another door on one side, perhaps matching were the book drop would lead, and a long hallway on the other with several open doorways leading off of it.

Hmm. This is looking less like a circulation area and more like librarian offices.

Still, open doors are promising. Cherry will go down the long hallway peeking in each of the doors.

Most of them lead to large rooms full of plants, generally no more than two or three of any given type, arranged neatly in rows and looking well-cared-for; there's also a room that's serving as a pen for half a dozen chickens, and one housing a family of rabbits.

Perhaps the Library lends things other than books? She wouldn't have expected a library to lend out rabbits, but maybe they reproduce quickly enough that you can borrow a few and then return their offspring within the lending period?

Or maybe she's just looking at the Librarians' lunches, and she's in the equivalent of a break room.

Regardless, this corridor does not seem like a good prospect for books. She back tracks and tries the other direction that might lead to the book drop. Maybe she can read some recently-returned items.

This door has the same kind of mechanism as the last one; it leads to a workroom full of tables cluttered with lengths of pipe and inscrutable pipe-moving mechanisms. There's a horizontal nook in the back with bedding inside, and the book drop lets out into a bin here; the bin is opaque, but at least not full enough that she can see any books sticking out of it.

There's a woman at the workbench, doing something with the pipe-related clutter; she doesn't seem to have noticed the door opening.

Oh! A librarian!

Weeping Cherry slides across the floor to the side where the librarian might see her if she glances up from her work. When she looks like she might be at a stopping point, Cherry will make a gentle dinging noise to get her attention, and show a picture of a book and a question mark.

The librarian seems confused and startled! She reaches for the forb.

Probably if she touches the forb, she'll notice that its not made of crafting material, which would be helpful because it might cause her to realize that something strange is happening.

But on the other hand, the man who was helping her earlier was very distressed at the thought of touching her, which at least suggests that if the librarian had all the information he did she wouldn't want to touch her.

She's not sure exactly why he was distressed, but plausibly she shouldn't let the librarian touch her without knowing more about her in case she regrets it? She slides back out of the librarian's reach and shows: a picture of her (in her current crystal form) in her lab, an explosion, falling into the lake, the path she took through the woods, and then another book with a question mark.

The librarian startles when the forb moves, and examines it uneasily; she doesn't seem to know what to make of the pictures. Instead of answering, she goes to get the bin from under the book drop - it turns out to be empty - and puts it on the floor under the edge of the worktable, then goes around to the other side of the forb, so that if it backs up again in the same way it'll fall off the table into the bin, and reaches for it again.

Okay, this is looking like maybe a repeat of the bucket incident. Weeping Cherry will scoot sideways to avoid being grabbed this time.

She tries showing herself sending pictures to a humanoid who sends little bubbles back, a picture of her reading a book, and then a picture of herself exchanging glyphs with a humanoid.