It is a book by Carlo IK0YGJ, that has just been translated into English. You can download it here: http://www.qsl.net/ik0ygj/enu/index.html
This book is the result of several years of experience in amateur radiotelegraphy. It suggests, for the first time, a learning methodology based on an integrated and multidisciplinary approach designed to accompany the apprentice from the first steps in ham radio all the way to a world-class proficiency in telegraphy. The book introduces, ad-hoc tailored to amateur radio, techniques used successfully by competitive athletes, including extreme sports such as free diving, adapted to the difficult process of learning telegraphy.
More here: http://www.eham.net/forums/CW/10885
Very nice work Carlo! Thank you!