Robert Penn has saddled up nearly every day of his adult life. In his late 20s, he pedaled 25,000 miles around the world. Today he rides to get to work, sometimes for work, to bathe in air and sunshine, to travel, to go shopping, to stay sane, and to skip bath time with his kids. He's no Sunday pedal pusher. So when the time came for a new bike, he decided to pull out all the stops. He would build his dream bike, the bike he would ride for the rest of his life; a customized machine that reflects the joy of cycling.

He's ridden for World Tour teams for 10 years. He's achieved top 10 finishes in Grand Tours. He likes coffee. These are just a few details about the professional rider who wants you to know what the view looks like from the centre of the peloton. What do the riders really make of Team Sky? How does the pay structure work? Why should you never trust a kit endorsement from a professional? Is doping still an issue? The Secret Cyclist tackles the big questions head-on, revealing a side to cycling that fans have never seen before.

James Witts is 45 years old, fatty deposits have begun to nestle on his back and he has a penchant for craft ale. He also rides a little. But not a lot. In his job as cycling journalist, however, he does have unparalleled access to the world's best riders and their expert support staff. Which got him thinking: could spending time with the pros, discovering the training, gear and nutritional tricks of the trade, transform this back-of-the-pack sportive straggler into a fit-and-fast frontrunner?

Charly Gaul is a forgotten cycling legend. Once a household name across Europe, the diminutive Luxembourger won the 1958 Tour de France and the Giro d'Italia twice. A unique rider, Gaul was supremely gifted at climbing and resilient even in the foulest weather. His pedalling style was smooth and swift, and he could set an unmatchable metronome rhythm on a mountain climb. 'Mozart on two wheels,' was how one contemporary writer described him; another dubbed him 'The Angel of the Mountains'.

Cycling fans obsess about climbs and big mountains. They love reading about their tests and tribulations, and they love to ride them - a cricket lover can never bat at Lord's, or a football supporter score at Wembley, but any rider can take on the challenge of an iconic mountain. There have been fine books about the big climbs before but never from the voice of an elite GC winner, taking you inside what these climbs really feel like, where the attacks come, where the pain kicks in.