Instruct: Classify Amazon reviews into positive or negative sentiment
Query: great book but hard to read

The book is great but I have to give only one star, I was very frustrated to keep reading this book, the font are too small and you need a special magnified lens so you will be able to read unless you have a very sharp eyes. Not a good book to read for old people not because of its content but because of it printing style. Not practical to use even with this low price because for me its end up to put this great book aside because I do not want to get blind!!!. this review for 1991 edition.