If you're not reading the same bible as the first Christians in 144 A.D. you're reading just another book.
The Very First Bible is not only the foundation of faith that virtually every denomination traces its canonical roots back to - it's also the only place you'll find the gospel preached by Paul the Apostle.
"But I certify you, brethren, that the gospel which was preached of me is not after man. For I neither received it of man, but by the revelation of Jesus Christ." (Galatians 1:8-9)
The first Christian bible consists of The Gospel of the Lord as preached by Paul the Apostle and referenced by him with the phrase "my gospel" on three occasions as found in the original Epistles of Paul. Within the Epistles are: Galatians, 1st and 2nd Corinthians, Romans, 1st and 2nd Thessalonians, Laodiceans, Colossians, Philemon and Philippians. That is the entirety of the first Christian bible as it was gathered and transcribed in 144 A.D. and as it is now. It has never been changed or altered in any way and it never contained a 'Hebrew bible' (Old Testament).