OK, so the grammar isn't perfect and there are some dodgy spellings in there. I don't know enough about the subject to commment on the accuracy of his calculations but I just wanted to know more about ballistics and, for that purpose, this book is just excellent. From an explanation of ballistic gyroscopics to a comparison of the amount of recoil from different rounds, from maximum range to bullet design, from velocity to rifling and wind deflection. It's all in there and it's all interesting. It's the sort of book you can pick up in a spare moment and learn something to irritate your shooting colleagues with. It depends on your level of knowledge and how techie you want to get - I've been shooting for thirty odd years and found lots of interesting stuff to read and learn.