However, your eBook doesn't have to be 100 pages. In fact, Joe Vitale's best selling eBook 'Turbo Charge Your Writing' is only 22 pages (and 2 of those pages are order forms). And authors give example of someone who wrote a book just 7 pages long that sells for between $30 and $50. The fact is that people are swamped with information. So shorter your book, better.

Vitale and Edwards both have impressive track records in online publishing. Joe Vitale (also known as 'Mr. Fire') is something of a legend in world of marketing. He has written over 12 successful books and has helped more than 200 authors to write, publish and promote their books.

Jim Edwards writes a syndicated newspaper column called 'NetReporter.com' and is a frequent guest speaker at national conferences on topics such as search engine traffic generation and 'shoestring' online marketing. He's also author of '33 Days To Online Profits' and 'The Lazy Man's Guide To Online Business'.

If you're like many aspiring authors, you may have urge to write your book first and then find out if there's a market for it. But as Edwards and Vitale point out, that's a formula for eBook failure.

In chapter 2 ('Setting Yourself Up for Success') authors show you how to identify your niche market, how to analyze their wants, needs and problems, and how to write a book that satisfies those wants, needs and problems.

The authors are both well qualified in this area. Jim Edwards has written five best-selling eBooks (including 'The Lazy Man's Guide to Online Business' and '33 Days To Online Success').

David Garfinkel is considered by many to be world's greatest copyrighting coach. He's an award-winning business journalist and is also author of several best-selling eBooks, such as 'Advertising Headlines That Make You Rich' and 'Killer Copy Tactics'.

There have been so many books on this subject that I really couldn't imagine how this book could add anything new.

But I have never before seen an eBook that explains so clearly how to do it. I got feeling that you could literally walk in Jim Edwards' footsteps and get same results he did (over 4,500 eBook sales in 9 months).

What makes this book very readable and enjoyable is that it's simply a long interview - David Garfinkel asks questions and Jim Edwards gives answers.

The book is packed with so many 'insider tips' that's it's difficult to know where to begin, but one of most valuable tips is how to find out - before you write your book - if there's a market for it.

You do this by following Jim Edwards' 5-Step 'Ultimate eBook Success Formula'. The formula allows you to find out if there's a target audience that is already actively looking for information you're about to sell online. And if so, if they are prepared to pay for it.

One of interesting things you'll discover in this book is that competition is actually good for your eBook.

If you come up with an idea for an eBook and you find that there are no competing books, you need to get worried - it means there's probably no market for that idea.

But if there are books competing with yours, you're on safe ground - you know you have a market.

And don't be put off by competition: anyone who is serious about a particular subject will buy at least 4 or 5 books on that topic.