15 copies of The Burning World by Isaac Marion to be won

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Isaac Marion wowed us with his 2011 novel Warm Bodies, a zombie tale with an unexpectedly emotional edge (Hollywood pounced on it, naturally, bringing us the movie version in 2013).

Now he's back with the sequel. The Burning World continues the story of R - the zombie who miraculously found his humanity returning - and his girlfriend Julie as they struggle to build a new life while the secrets of his past return...

Twice the size of its predecessor, it's a sprawling, action-jammed epic and we have 15 copies to win. To be in with a chance of winning one, just answer this brain-teaser...