Rosen was born in Cornwall. She studied psychology at Oxford before moving back to the West Country.
She now lives on the south coast of Devon with two imaginary cats, fantasising about getting a real one.
Readers have downloaded over 200,000 copies of Rosen's books. Several titles have broken into the Amazon charts, including a number 1 humorous fiction bestseller.
Whose are those strange knickers at the foot of the bed? Is the kidnapped girl gone forever? How do you transport a dead dog across central London? What on earth is wrong with the man next door? And is he going to kill me?
So called because of its alternation between laugh out loud comedy and more sinister, psychological tales, "Seesaw" showcases some of Rosen's most loved shorts, alongside some previously unpublished bite-sized tales.