That leaves him with some time left that he'll use to Prestidigitate his clothing clean over the sink in the ensuite bathroom (not that Keltham is remembering to be appreciative of this incredible luxury).
He thinks a bit, his thoughts tentatively trying out a review of recent events, before he concludes that in fact he shouldn't do that and should try to decompress more instead, while he's alone by himself in the quiet.
He'll poke through the fourteen-volume history on 'Absalom', which becomes more interesting after it becomes clear that Absalom is where the Starstone resides. The quality of the reasoning in the history books is something like six times better than those of the books in the villa library, more like 1 reasoning error per 2 sentences instead of 3 reasoning errors per 1 sentence.
...is that because the palace can afford better books than - but why - why would - books, information, you should just be able to reprint the best versions of things if the information exists - do more intelligent authors demand incredibly high book royalties to the point where most people can't afford good information about basic subjects? Golarion why.
The book's contents seem to be dated to before Aroden died, which, if Keltham is recalling correctly, was a century ago. Maybe that's at least how long it took for the incredibly expensive slightly smarter and better-reasoned book to have its copyright decay to where it could sell enough copies to be worth printing? Golarion, again, why? Information is very easy to make more of; information on core topics is among the most blatant possible cases where Civilization has an interest in everybody being able to afford it.
All the altruistic smart people are off wearing intelligence headbands and being wizards at the Worldwound, maybe.