It looks like... the booksellers having a broad selection of Chelish history books, rather than that having to wait for the library, after the Conspiracy has had a chance to frantically produce a lot of new books, half of which aren't for sale or borrowable.
Or there not being totally logical and rational in-universe reasons why a visit to Ostenso has to wait until tomorrow.
Or the booksellers' book 'critical' of Cheliax sounding a bit more like the books 'critical' of Qadira.