Rosen was born in Cornwall. She studied psychology at Oxford before moving back to the West Country.
Readers have downloaded over a quarter of a million copies of Rosen's books. Several titles have broken into the Amazon charts, including a number 1 humorous fiction bestseller.
Only the bravest children come back from the Munchfoot Mountains alive.
Will you fight, will you scheme or will you run away? There are over 100 decisions to make as you choose your own path through this bumper book of gruesome and terrifying scenarios.
A school camping trip is not the best time to find out that trolls are real, especially when their food of choice is freshly caught child. You and your unlikely band of friends are the only ones who can put a stop to the gory bone-crunching that goes on in Munchfoot.
Recommended age 8-12.