Zechariah and wife Elizabeth had no child, an angel appeared to them telling that they would have a son. The boy was named John, he grew up living in deserts feeding on grasshoppers and honey. God showed a revelation unto John about a savior coming to save the world, that savior was Jesus. John asked people to repent and be baptized because the savior coming was more powerful than him.
The book tells us a story of the baptism of Jesus by John the Baptist ,it promises to be an interesting story to every child.