I have been reading the new book "The Angel: The Egyptian Spy who Saved Israel" by Uri Bar-Joseph. 1) typical Israeli propaganda account of an Arab spy: exaggeration of his contributions and usefulness. 2) this account proves that he in fact started his services in the Sadat era and NOT in the Nasser era as previous accounts had mentioned. 3) Israeli deep-seated racist distrust of Arabs helps the Arabs: they can never fully trust the Arabs even if he was working for them. 4) Sami Sharaf who worked for Nasser bears responsibility in hiring and trusting this guy. It is clear even from this account that Nasser never liked Marwan and never trusted him.