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.
Written in response to Jeremy Clarkson's remarks about the selfish nature of suicide on railway lines, "The Selfish Act" is a short story that paints a more insightful portrait of the mind of a suicidal person.
Morwenna has a very satisfying life, but she's plagued by an undiagnosed mental health problem that she refers to as, "Too many thoughts."
When she wakes up the morning after her engagement party, feeling disconnected from the world, her despair drives her to a railway bridge. She finds herself trapped between the reality of phone calls from loved ones and the alternative universe painted by desperate depression.
Please note: This is a political response, intended to contribute to the debate about whether or not suicide is selfish. If you want to be entertained, another title by Rosen Trevithick might be more appropriate.