"Marathon" by Gerard Henry Betz is a book that tells about the exciting world of running competitions and sports achievements. The author shares his many years of expertise in this field and inspires readers to achieve their own athletic goals. The book "Marathon" will be a useful tool for those interested in running, sports and personal development. With the help of this book, readers will not only receive practical advice on training and preparing for competitions, but also motivation and positive energy to achieve their sports dreams.