The Book of Hebrews was written by an unknown author.
The fourteenth of the Epistles, and the nineteenth book in the New Testament, is entitled Hebrews. It was written in approximately 68 AD, but by whom, we do not know. Several possible authors have been credited with the work, but the style of writing is unlike any other books in the Bible, and so the author remains unknown.
The letter is addressed to Jewish Christians, many of whom found themselves persecuted by their fellow Jews. The writer of Hebrews fears that Jewish Christians are in danger of slipping back into the Jewish faith because of this persecution. To affirm them in their new found Christian faith, the author shows them Christ's superiority over all Old Testament laws and practices. He urges the Christians to remain true to the Gospel of Jesus Christ, their saviour.
Hebrews 10:14-18
"For by one offering he hath perfected for ever them that are sanctified. Whereof the Holy Ghost also is a witness to us: for after that he had said before, This is the covenant that I will make with them after those days, saith the Lord, I will put my laws into their hearts, and in their minds will I write them; and their sins and iniquities will I remember no more. Now where remission of these is, there is no more offering for sin"