The chief difference is in the omission of seven complete books and parts of two others from the Old Testament in the Protestant versions. The books omitted are:

These omissions should certainly be a matter of concern and investigation. The entire Christian world accepted them as the inspired Word of God until the Reformation. If they did not belong there, then God had permitted the entire Christian world to be led astray for more than a thousand years. On the other hand, if they DO belong there, then Protestants are being deprived of a good portion of revelation and the inspired Word. No one would presume to say that anything inspired by God is unimportant.