Cheap used books

You may check a bookshelf which locate at the library for exchange of book. Sometime have kids book. Otherwise, you may check on carousell

Carousell is usually a good option for used books, also FB communities can be a good shout too.

Bras Basar level one. There is a book shop that sells alot of pre loved book for all genres.

Agree with Bras basah and Carousell. You can also check salvation army and beach road.

Are you looking for textbooks? You can try this website: http://bookinbookout.com/

There are some shops behind national library in Bugis

Try bras basah complex or Carousell app

Carousell or bras basah

Try carousell

Carousell..