The holy book of Christianity is the Bible, for Judaism is the Torah, and for Islam Qua’aran. The holy books compare to each other because have some of the same teachings. They are guidelines for people’s lives, and they all have a similarity of one origin.
Judaism believes that the Messiah has not come yet, Christianity believes that Jesus was the Messiah and he will come back, and Islam believes that the Messiah is a prophet.
He three religions have similar beliefs because they all believe in God.