Tourist or not, maybe you need a Sydney Guide, a map or just a book to read in the airplane. In any case, you will look for a book store.
Dymocks Booksellers is the biggest and one of the oldest booksellers in Australia
. There are many franchises established across the city, covering most suburbs.
I can not recommend them as being the cheapest, but they will offer you in general a bigger range than other bookstores.
If you look for a book other than in English, I think the chances are very slim. Even a translation in English of a foreign writer is difficult to find, unless an American movie was made after that book recently.
tourist information ...
How to get there
A five minute walk from Town Hall
Station. See map
424 George St
Sydney NSW 2000
(between King & Market Streets) See map
Ph: 02 9235 0155
Web site: Dymocks Booksellers
Hours of Operation
Open seven days a week. For certain public holidays
is possible to be closed. Check online