Book #13 of the Papa Pontivy series. It is also Book #10 of the Tiger Lester series.
An attack on a teenage schoolgirl in England has major espionage implications so Tiger Lester is called in to investigate and he asks his close friend and colleague, Midge Parker, to go undercover as a student. Since this matter is far more than just a sex offender case, Lester also asks the help of Papa Pontivy who also brings in Bernard Newman. The whole case will start to point towards the building crisis at the Suez Canal as well as an effort to destroy NATO cohesion. In French, NATO is spelt OTAN.