The SCMP reports that Page One in Causeway Bay has closed (Bookshop at end of last chapter in Times Square), though it seems possible that it may re-open if space can be found. So not really the end of the last chapter, then.
The one in TST moved recently and became a “concept store”. At first sight it appears to have become a magazine store with a few books, but hidden away upstairs is a reasonable size bookstore.
The concept, of course, is high-priced books, but the SCMP seems not to have picked up on that:
[T]he closure of its Causeway Bay branch signaled wider difficulty for English-language bookshops, publisher Jimmy Pang Chi-ming said.
"Hong Kong people read few books. They read fewer English books, and even fewer hard-cover collectables," he said.
Well, maybe they do read books but don’t want to pay excessive prices. English books are typically marked up by 25% in Hong Kong. Strangely the same books are available in Bangkok without that mark-up, or in India for significantly less.
Or you can buy from Amazon or Book Depository.