Instruct: Classify the given review as either positive or negative.
Query: .... just too hard to navigate....

The author may have done some good research, but this book is WAY too "messed-up" to try to read! As other reviewers have said - just too many misspelled words; punctuation errors; etc... grossly poor editing, thru and thru...Get a PROFESSIONAL editor, and re-release/re-issue it... maybe then...