Maybe someone gave it to him as gift.
And if so, he should follow the instruction as contained in the St. Pius X catechism regarding prottie "bibles":
"Q. What should a Christian do who has been given a Bible by a Protestant or by an agent of the Protestants?
A. A Christian to whom a Bible has been offered by a Protestant or an agent of the Protestants should reject it with disgust, because it is forbidden by the Church. If it was accepted by inadvertence, it must be burnt as soon as possible or handed in to the Parish Priest."