What politician or world leader is co-author of the book ‘Judo: History, Theory, Practice’ (2004)?

Answer 1

Main authors:Vladimir Putin, the President of Russia,
and co auther:Ezio Gamba

Source:
https://books.google.co.in/books/about/Judo.html?id=wP3AsSMOl4YC&redir_esc=y&hl=en

Information from Reviews:
http://www.amazon.in/Judo-History-Practice-Vladimir-Putin/dp/**********