Pleasingly, this book is not just about disabled mountain climbing. The focus is very much on the expedition up Mount Everest, with lots of wonderful photos and information boxes that are perfect for keeping younger readers on track. The information specific to Mark's disability is put into context very well, so the interest for the reader becomes in learning about the next part of his adventure rather than focusing specifically on the fact that he is doing so as an amputee climber.
The book includes lots of asides that will serve younger readers well, such as the fact that having a poo on a mountain in the snow is quite a challenge, or that the human body needs to fart a lot at altitude to help balance up the relative air pressures of outside and, well, inside!
From a younger readers point of view, be aware that there are some fairly graphic images towards the end of the book which show Mark before his surgery to repair the damage done during his climb of Mount Everest. He needed his fingers and stumps 'trimmed' to remove frost bitten areas of tissue, and the images are not for the faint hearted. Most younger readers will probably relish the 'ooo, gross' factor here, but do take care to check them out first!