Rachel Cullen is a writer, blogger, author and runner. She is also a reformed ex-commercial litigation solicitor. Amongst other things, she has abseiled off Table Mountain, jumped out of a plane at 11,000ft, climbed Mount Fuji, worked on a game reserve in South Africa, qualified as a scuba diver and ridden an ostrich. This is her first book, detailing her very personal journey from bipolar non-runner to medal-winning marathon runner - and how she discovered happiness along the way.

Follow Rachel on Twitter @writtenbyrach and read her blog at rachelcullenwrites.co.uk - she would love to hear from you.