This book is probably the greatest single reference for the modern popular music fan. The last edition of "Top 40 Hits" that I owned only covered up to 1990, and it was around 600 pages long. This new edition goes all the way up to 2009 and it's huge---900 pages---almost a third longer. I have been without one of these Whitburn "Top 40" references for a while and I had forgotten how much I missed having it as a music listening tool. With this book you can identify your favorite top 40 hit record (from 2009 back to 1955) when you hear it on the radio, or just look up your favorite song titles to see when they were hits, and learn their peak chart position. Or you can see just how many of your favorite band or artist's songs made it to Top 40 hit status. The thoroughness of Whitburn's research is unbelievable! In this latest edition there is still trivia about many of the bands and artists including listings of many bandmembers and their previous and subsequent musical involvement. And in the hands of a skilled music programmer, this book is a powerful programming tool. So it is both entertaining and useful. I guess it's all a matter of perspective, but since I received my copy it has never been up on the shelf. It is out on the table, and used almost constantly. This was some of the best reference book money I have spent in a long time.