The world’s biggest book has been written about the leader of one of the world’s smallest countries.

Croatian author Hrvoje Sosic has claimed a new world record with his biography of former Croatian president Franjo Tudjman.

The mammoth publication has 3,604 pages and weighs 12 kilos – the equivalent of 12 bags of sugar – and will be the biggest ever when it goes on sale this week.

Sosic told daily newspaper Jutarnji List: “It is the biggest ever book about a country’s leader. There are no such books on people like Dwight Eisenhower, Winston Churchill or Charles de Gaulle.”

Tudjman, also a former Yugoslav army general, led Croatia to independence in 1991.