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Ed Husain is a British Muslim who became an Islamic fundamentalist when he was 16. Five years later he turned his back on fundamentalism and returned to "normal life".

is a book he's written to explain "why I joined radical Islam in Britain, what I saw inside and why I left". Ed believes his experiences can help to explain the appeal of extremist thought, and says Britian is "sitting on a time bomb".

and explain in far better detail. Please have a read and share your views with us here.

Ed will be in the World Have Your Say studio today to answer your questions.

If you'd like to ask him a question, post it below, or email us, and if you'd like to come on air, let us know your phone number.