An ebook is simply a book that you read on your computer. They usually come in one of three formats: PDF files (as created by Adobe Acrobat), Exe files (executable books), or Ebo files ( Microsoft Ebook format). PDF files are the most widespread format. Exe are less popular as they are only compatible with Windows, and often exe files contain viruses.
Ebooks are extremely popular products for sale on the internet. Everybody these days seems to be a guru with their own ebook to sell to you. Ebooks are popular products because they can be downloaded immediately with no delivery costs to the author.
And if they aren't selling you an ebook, they're giving you some for free, so that you will join their mailing list. Hey, it works!
CutePDF is a great free program that converts documents into PDF format.
Useful links:
www.viralpdf.com - customise links
www.ebookcompiler.com