The National Library located along road 92, near Wat Phnom provides service from 8am - 11am and 2 pm - 5pm. The National Library was built in 1924. The building was raided during the Khmer Rouge Reginee (1975-1979) as the result all books in the library were destroyed, which seemed to mark the end of education in Cambodia. After the khmer Rouge Regime was taken down by Vietnamese troops and Khmer troops, this educational building was restored and became an important educational constitution again.
Today, the National Library is rich in Khmer documents which you can be accessed to almost what ever you want. Librations are available for help.