If you haven't heard of him he's one of the world's top copywriters and has been involved in multiple seven figure product launches for quite some time now. I actually learned about him through a well known marketer sending out an email about how good this book was. I was a bit dubious at first but can honestly say it's the most useful thing I've ever read on selling.
Not only that but it's completely geared towards online sales copy so for anyone who's working out how to write a compelling review for a clickbank product, a sales letter or email then you are seriously missing out by not having read this book. I'm already putting some of the tips into action now and I've only had it a few days and read about 80 pages. I've been tweaking one of my sites to follow his blueprint and it looks and reads soooo much better.
Get over to amazon and get it cos this $12 book could make a huge difference to your marketing for a long time to come.
PS - If you couple this with another highly praised book in the marketing community (especially on the WF) called 'the millionaire fastlane' then you will never ever need to buy another crappy clickbank marketing product for the rest of your life. All of the info and strategy you'll ever need to make money is in these two books.