Grobar author and Partizan Belgrade fan James Moor features in the final episode of the brilliant Copa 90 series Derby Days.
The Belgrade derby - between Red Star and Partizan - is the subject of the ultimate programme in the YouTube hit, and Moor who penned his book during a season following Partisan gives some fascinating insight into the 'Eternal Derby'.
The critically acclaimed Grobar is the tale of Moor ditching Arsenal, his first love, and switching allegiances to a new team.
Handed a Foreign Office posting to Belgrade, he gives up his season ticket and looks for a new Serbian team to support.
Being a veteran of the Congo and Helmand Province war zones stands him in good stead for what follows.
Having chosen Partizan over Red Star, James enters a scene awash with nationalism, xenophobia and conspiracy theories.
He lifts the lid on Serbian fan culture, Partizan's internal disputes, violence between the club's own Grobari (Undertakers) supporters as well as with their hated local rivals.
During a tumultuous season at home and in Europe, attending matches among crowds of 50,000 and 2,000, and sees games interrupted by stadium fires at a club permanently at war with itself.
Click here to view
Click here for more information on Grobar, including a free try-before-you-buy first chapter of the book.