The range of difficulty is from fairly easy to moderately hard. This is a book that can help you grow in skill while having fun and making a joyful noise. I appreciate that every song has both notation and tablature. Most of the pieces are in standard tuning. Many are in drop D tuning and there is a section of DADGAD songs.
I don't think that the author(s) or editor(s) are credited, which is a shame because I'd like to buy more books from the same person or team.