I noticed that this book is now listed for $195. When I purchased it a few weeks ago, it was listed for $90. It's not worth it -- especially since there is a form in the back of the book offering additional copies of the book for $19.95.Like a previous reviewer, I publish a weekly newspaper and I am always looking for ideas to boost sales. This book does have few useful tips, but it gets lost in all the hype. It is primarily about newsletter and e-mail advertising. It also goes into the history of the Ziff-Davis company.Basically, if you can find this book for around $10-$15, it may be worth a purchase, but anything above that is a rip off. Don't be fooled by the title and the hype. The most "amazing formula" was the title that guarantees book sales.