I was not all that impressed with book 2 in the series.

1 The Kill Artist 2000
2 The English Assassin 2002
3 The Confessor 2003

But book 3 was better. A Dan Brown type thriller where the Israeli assassin is called in to prevent an attack on the Pope.

… The new pope, Pietro Lucchesi, who calls himself Paul VII, immediately angers powerful members of the Vatican by announcing his desire to speak at the synagogue of Rome. Opponents, such as Cardinal Marco Brindisi suspect that Paul VII intends to unearth candid and potentially damaging information about the role of the Catholic Church during the Holocaust. …

It motivated me to continue on to book 4 – A Death in Vienna (2004).