Its your choice to read or listen to all the lost Holy Books and if yiu choose not to on Judgement Day God will ask you why did you not seek out my Words given to my prophets on earth ? What will you say in response to Gods question ? For he that once came and was Gods only Son will also ask you why ? The one that was and is to come again the Messiah of all humanity.
But, remember, God is not one Religion or Another . He gave you free will and only you can make that decision to know all of the Words of God.