You may consider my interests to be a bit niche, which could potentially limit your interest in the titles they have narrated, but I'd recommend the following: 'The Gentle Art of Tramping' by Stephen Graham, 'A Walk in the Woods' by Bill Bryson, and 'Orchard - A Year in England’s Eden' by Benedict Macdonald and Nicholas Gates. I find their styles of narration soothing and entertaining. I often find myself unable to enjoy audio books due to the narrator being a poor match for the subject matter, poor pacing or a voice devoid of character and enthusiasm. But Mike and William are both brilliant. If you do like the sound of the books mentioned above, I'd also point you in the direction of 'Alaskan Retreater's Notebook: One Man's Journey into the Alaskan Wilderness' by Ray Ordorica, narrated by Stephen Bel Davies. He does an incredible job. I found myself only vaguely interested in this book, at best, but put it on when working in my garden. The charming narrator and the unexpected evolution of the book from dry instruction manual into a heart warming tale of a man deeply moved and forever changed by the animals he shared his spot in the wilderness with, utterly captivated me.