2015, first published 2013This is the tenth and final book in the series. It is really some back story and gives a first person account of Yassen Gregorovich, whom Alex Rider, his father and his uncle have encountered.
We learn how Gregorovich became as assassin. His parents were involved in something dangerous. This went wrong and he had to fend for himself. He ends up becoming involved in Scorpia. He is a reluctant killer at first but manages to develop the habit. This novel ends where he allows Alex to escape.
The use of first person is unusual here yet it still doesn’t read quite like a YA book yet. This is supposed to be Gregorovich rereading his diary just before he goes out on a mission. Only the last couple of chapters are concerned with the present mission. This is the only part where we see Alex. The diary however is a little too sophisticated for a young man, especially in the early parts which he should have written when he was a young boy living on the streets. We have to suspend our disbelief. However, this form does give us some insight into the character.
There are shades of Oliver Twist. When he lives on the streets he meets a character called Fagin. He is pushed through an open window and gets caught by the man he is trying to rob. This man does indeed take him in. However, he is not as kind as Oilver’s rescuer.
The book is 405 pages long with blocked text in a simple font.