Harri has an academic background in literary studies and Welsh culture, including both an MA and a PhD in Welsh writing in English.
He has contributed to several academic journals and worked as a reviewer for the Welsh magazine Planet and the Welsh literary journal New Welsh Review.
He is a member of the Outdoor Writers and Photographers Guide and, until autumn 2013, was the editor of the members' magazine, Outdoor Focus.
Harri is the author of several print walking books and has contributed articles to Walking Wales magazine; he also writes regularly for several online walking sites. He is a fluent Welsh speaker and works as a freelance Welsh translator, editor, book reviewer and proof reader.
Harri is as passionate about hiking as he is about Wales and believes that some of the most stunning natural landscapes and trails remain undiscovered by hikers. He hopes his books will change that.