NUS has 5 librarieswww.lib.nus.edu.sg tells you where the 5 libraries are. you can entre the library if nobody check your student/staff card and read open-shelf books. but you cannot borrow books. you can't use digital library either. you can subscribe membership, 400 singapore dollar/year. however if you are NUS aluminus, it's 100 singaproe dollar/year.