In contrast to traditionally published books where the number of book pages is usually high, in the ebook world ,ebooks can be anywhere from 10 pages to 250 pages or more.
The eBook market is more forgiving in that customers will buy your books as long as it has value.
For example, an ebook “How to Get Your eBook on Amazon” sold for $15 USD, and was 13 pages.
The ebook “Improve Your Credit Score In 24 Hours, is 35 pages. This book has sold 70,000 copies.
An ebook about writing a publicity “pitch letter” written by Don Crowther is 13 pages.
So if the information in the book is valuable, length is not an issue. Though the longer the book, as long as the information is juicy, the more you can charge.
Some e-books, with specialized information, like a list of publicity agents around the country, are over $200 dollars.
Good luck finding a topic you know your customers will like. When it comes to ebooks, it is the quality, not quantity of pages, that matters.