The term 'Holy Book' can refer to three different books: the BIBLE, the KORAN, and the Quran. The BIBLE is a collection of religious texts from Judaism and Christianity, and is considered sacred by both religions. The KORAN is the central religious text of Islam, and is believed to be the word of God as revealed to the Prophet Muhammad. The Quran is the Islamic scripture, which Muslims believe to be the literal word of God. All three books are considered holy and are used as a source of guidance and inspiration for their respective faiths.