Book excerpt: After Cambridge scholar Nathan Tobin discovers an ancient Aramaic letter, he finds himself thrown into an agonizing struggle against powerful forces committed to discrediting him. The Alexandria letter discloses surprising revelations about the lives of Jesus and John the Baptist, as well as shocking claims of duplicity by Paul of Tarsus, which threaten to turn long-held principles of Christianity on their heads.But as he races to verify the authenticity of the letter, he faces rejection by his fellow scholars and sinister opposition from within the Church that aims to stop him at any cost. The Alexandria letter represents the most important work Nathan has ever done, but it may also be the last.