I might take some time this weekend with a bottle of Mount Franklin and see what I can manage to set alight, if anything.

If I do manage to get a book on fire, will they ban water bottles from aircraft to avoid possible in-flight fires?:p:D

I'm pretty sure that you don't need the Mythbusters budget and/or talent to purchase a plastic bottle of water and fiddle with its shape to see if you can focus the exiting light into a spot.

Nick, if you cannot prove the myth, dont forget to blow something up Mythbusters style

Adrian, I'll do my best!