Reverent Disposal

Speaking of books, how are you supposed to destroy a worn-out Koran, especially one that's been turned to worldly purposes like messages between prisoners scribbled in the margins?

I haven't seen any mention of what would've been the right thing to do. Bury them? Get a Muslim to do the burning?

If I were, ahem, "detained", I'm afraid I'd at least think of using my Bible for something like that.