From the reviews of the first edition:

„This excellent book is the most complete development of cosmic ray astrophysics theory published. It is aimed at current researchers and commencing postgraduate students. … One of the great benefits of this book is the explicit description of all the assumptions that are made and the limitations they imply on interpretations from the theory. This makes the book particularly valuable for postgraduate students and established researchers starting in the field.“ (M. L. Duldig, The Physicist, Vol.39 (3), 2002)