I checked the book's accompanying web site ALLGPS.com before I bought it. If a reader is looking for good examples of the fundamental sciences, modern technologies and GPS resources, I think this is it. The other reviews also acknowledge it is the first rate in GPS. While it is a good idea to suggest a surrogate writer, I can not see this easy and fun GPS entry level booklet may cause any upset. English, being the language of the world, is a means of communication, not for rhetoric only. As a decent teacher and fair critic, I'd like to say this book is very helpful to my science class.