Rosen is a British bestselling author, who writes fiction for children and adults.
She was born in Cornwall and grew up on Restronguet Creek. She studied Experimental Psychology at St Catherine's College, Oxford, before moving back to the West Country. She now lives in Falmouth with two imaginary cats, fantasising about getting a real one.
In 2011 Rosen was an aspiring author. Writing was a hobby. The following January sales of her Kindle books took off. Readers have now downloaded over a quarter of a million copies of Rosen's books.
Rosen has a variety of books in print including Pompomberry House and Seesaw, as well as over a dozen digital titles.
In 2013 she founded the Smelly Troll series - children's chapter books written by Rosen and illustrated by Katie W. Stewart. Book one, The Troll Trap, has inspired hundreds of children to try their hand at creative writing.
Rosen writes in a variety of genres with a strong leaning towards comedy. She has also dabbled with psychological fiction and mystery writing.
She loves wild swimming, mountain biking, interesting boots, quiffs, 'sampling' chocolate and cooking tasty treats. She dislikes house spiders, doing laundry and people putting costumes on their cats.