Awful. A struggle to read and not worth the effort.
Bad, but not awful. Didn't work for me, but others may love it.
Fair. This means generally I didn't love it, but I didn't hate it either. A decent read.
A great read, but maybe lacking a certain something for the final star. Would recommend the book - as others may not be so critical!
Amazing. Would read again (and again) and highly recommend to others.