This is the Fifth Book in the Alex Rider Series. The story is quite a bit different than the other books in the series and there is more about Alex's past, but other than that the book is similar to all the previous Alex Rider books.
Alex travels to Venice, Italy in the hopes to find Scorpia and information about who his father really was. In Venice Alex meets Julia Rothman, a beautiful and deadly woman who knew Alex's father well. Alex is recruited by Julia to join the criminal organization Scorpia, and kill his former tutor and member of M16 Mrs. Jones. Alex must decide who he really is and how much of his past he will let affect his future, before he is killed by one or both organizations.