I have featured Udo on my declassified documents website as a whistleblower feature. You can read that here.
Udo had a great interview with Russia Today in 2014, you can watch that here.
Read an ActivistPost web link about Udo here.
Here is Udo's wikipedia page.
Udo has an English version of his book Bought Journalism coming out in May 2017:
Udo's English Book
If you speak German, Udo wrote many German books.
RIP Udo Ulfkotte, a true hero.