There are plenty of bookstores in Hong Kong, but there is one in particular that I like which sells all sorts of books, new and second hand: flow books store. I go just to browse and to see if there is something that might interest me, and also when I need a Lonely Planet guide. I like to buy a guide when going to a new destination and I think that a new book is a bit extravagant for just one trip, so this bookshop provides a solution. You just need to check the edition date, as things might have changed if it is old.
If you have books to dump you can bring them there too. You will get “credit” for them to use in the store.
A friend showed me this store five years ago and since then it has relocated four times. They usually post a sign on their old location showing the new address, which is generally not too far away.
FLOW BOOKS store
ROOM 204 LYNDHURST BUILDING, NO. 29 LYNDHURST TERRACE, CENTRAL, HONG KONG
(852) 2964-9483 (852) 9278-5664
You can also find them on facebook