...Something she can use to buy books and also a plane shift back to Golarion. Possibly and also some money usable on Golarion itself? She is not expecting these to be intersecting categories but if they are, that. 

The axiomite moneychanger's aphorite translator-to-nonlawful-mortals says that credit at a bank of Abadar would be the most transferrable-and-carryable, but although he can turn it into Aktun's paper currency for her and banks of Abadar will take that in Golarion, it would be either impractically large notes - too large to use to buy things here or else so many physical bills that she'd have trouble fitting them into her wallet, even if she had a Bag of Holding for the purpose. She would be advantaged by depositing most of the money in an Abadarian bank, so it will earn interest and be harder to steal.

Sure, sounds good. She will take a basically practical amount of Aktun paper currency for her immediate shopping needs and the rest can go in the bank. 

Right then! There's a branch of the bank just across the street (there's a lot of Services For New Visitors clustered near the portals) and she can go set up an account there, they can give her this money in cash and this in a check for the bank.

She accepts both and heads over to the bank to open an account. 

Which is very simple! She can only withdraw part of it on worlds outside of Axis because of interplanar treaties and the limited cash on hand of planetary banks, interest will continue to accumulate at standard rates in the Axis bank, here's your checkbook, if you lose it there's a procedure involving Greater Dispel Magic and Abadar's Truthtelling you should go to report it, here's your card, you can use this to buy things in Axis (but not worlds like Golarion).

Huh! Neat. If banks in London worked more like this maybe she would have greater occasion to remember they exist. 

Next stop: bookstore. Obscure niche Taldane-language bookstore, even. 

The obscure Taldane-language bookstore (a) will require a tram ride to get there (with a wide variety of aliens, admittedly not a lot more than you'd find in London) and (b) is still pretty large. There's lots of books there, from Absalom and Isarn and every other major city in Avistan, most neatly printed but with Scriviner's Chanted and actually handwritten copies at higher prices and in smaller quantities.

Eeeee! 

The tram ride is delightful. She's seen trains before, of course, but none as nice as the tram. She did her best not to gawk at the other kinds of people like a bumpkin tourist, but--so much morphological diversity in one place! 

Lucy's world of origin has had the printing press for centuries and so the fact that these books are printed straightforwardly doesn't occur to her as noteworthy. She would like to purchase a number of romance novels greater than would be practical without her vest of pockets but less than would be impractical even with her vest. ...And also some non-fiction, too, just to be sensible. Stuff about gods and afterlives and What The Fuck Is Up With Ustalav, if the latter is available. 

She can find all these things! There's shelf after shelf of romances (Modern Chelish romance novels are in a different section from all other romance novels) and adventure stories full of swashbuckling and beautiful tragedies and SHOCKING TALES and satires and elaborate literary analyses of a tragically broken world and philosophy and theology - 

- Okay there are only two What The Fuck Is Up With Ustalav books and they're both super speculative, but, there are two of them.

She will take both of those then! She sold an entire ribcage's worth of diamond and her budget is "how many books can I fit in my pockets and still expect to be able to carry other stuff," not anything to do with how much money she is willing to spend. 

She will also pick up a reasonable amount of theology, after perusing those shelves for takes on theology relevant for her specific interests. 

(She peeks briefly at the Modern Chelish Romance Novel section and then gives up on it in disgust.)

...She is not optimizing exclusively for diversity, in her romance novel selection, but she does want it, both in terms of protagonists and writing styles slash literary traditions. And then she will also pick up some non-romance-novel fiction and recreational non-fiction as it happens to catch her eye and subsequently interest. 

She could absolutely spend hours having fun exploring this bookstore and refining her shopping list but instead she is going to, once she has a reasonable list drawn up at all, spend an objectively unreasonable amount of money on books, pack them up into her vest, and then go find the person from the listing she selected that advertised plane shifts to Golarion. Possibly this will involve another tram ride. 

The can find a lot of different kind of ROMANTIC ADVENTURES from a lot of different places! She's still limited to the fact that Taldane isn't spoken (and literary Taldane isn't written) in that many countries and most of them are culturally descended from Taldor, but that won't stop her from maxing out her Book Capacity.

(And it WILL!)

She spends the tram ride alternating between looking around and appreciating being on the tram, and reading the first of her two Ustalav books. 

The Ustalav book argues - in so many more words than this - that the reason the entire country is haunted is ghosts; when the Varisian people coming east displaced the native Kellids, this displacement involved lots and lots of murder, and so the vengeful spirits of the Kellids sank into the earth, and their lurking malice still poisons it against all the descendants of their killers. It suggests that these ghosts are deliberately being kept active and wrathful by the rituals of the surviving savages who have infiltrated society, and paints a lurid picture of secret infernal ritualists gathering to rouse the souls of their ancestors to wrath against all who dwell therein not of pure Kellid blood.

And then with an abrupt pop a lantern archon appears in front of Lucy!

"Hello! Are you the person who helped the people in Ustalav and Geb?"

"--Yes, I am," she says, marking her place and stuffing her book back into her pocket. "My name's Lucy, can I help you?"

"I am a messenger from Andoran, which is a Good country that needs help! They have lots of sick people and lots of dead people and they want to ask you to help them!"

"I would love to help them! I'm on my way back to Golarion now, I was planning to do something about Ustalav's lingering vampires next but absent an actual plan for tracking them down just healing a lot of people is always a good fallback plan." 

"Thank you on their behalf! Should I let them know that you are on your way?"

"How far away is Andoran from Ustalav, my party is still in Ustalav and I want to pick them up before I head over." 

"The geographical center of Ustalav is nine hundred and eighteen point seven miles from the geographical center of Andoran!" says the lantern archon, and bounces.

"Should I go to the geographical center of Andoran?"

"I do not know! My summoner is in the city of Almas!"

"Who's your summoner?" 

"Anghela Elbrera! She is Neutral Good and a cleric of Milani, Chaotic Good goddess of hope and resisting evil!"