Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Timely, profound, a classic!

I just finished reading Erwin Chargaff's "Heraclitean Fire: Sketches from a Life before Nature" and all I can say is--"Wow!" Not only are the author's insights and experiences offered with incredible wit and richness, but the book is as timely and profound today in the year 2000, as when it was first published, almost twenty-five years ago. This book, desperately, needs to be read by all concerned and intelligent people around the world, as well as, all students, among institutions of higher learning.