Especially a book, written by Alexander Litvinenko at the request of his "wealthy patron", Boris Berezovsky !
I assume you are talking about this Yanderbiev:
Offering an all out support for the Chechen Muslims in their jihad (holy war) against Russian infidels, Taleban's Foreign Minister Wakil Ahmad Motawakel also called on all Muslim nations to officially recognise the Chechen Republic and offer the Chechen fighters all kind of military, financial and humanitarian assistance.
"Now there is fighting in another Muslim home, it is the religious obligation of all Muslims to rush to the help of their brothers," he said during a joint press conference with Zelimkhan Yanderbiev a visiting Chechen rebel official.