eBooks can be downloaded from internet in many formats. You can download an eBook according to your need and in the format which your device supports.
The best and common format is PDF. PDF files require acrobat reader which is free to download from Adobe's website. And PDF Files (eBooks) are
accessible form any device. If the eBook you want to read is in HTML format then you can simply read the eBook online without bother to download the eBook on your PC or Mac or laptops.
eBooks are the best way to promote your Blog or any product that sell or give services. You can write an eBook about your services or anything like that and then you can give it for free to your customers. And if you are planning to earn some money from your writing then you can publish your eBook on internet and people will easily buy your eBook if they found your information worthy written in your eBook.
eBooks could replace the printed books in near future. eBooks are more comfortable and easy to carry if you have your eBooks stored in your mobile phone. You can easily carry thousands of eBooks in your pocket through mobile phone you have. And moreover you can get plenty of information for free through eBooks and you don't even have to go to book shop for buying it, you can simply download eBooks from your home through internet.
So now the choice is yours that what you want to do with eBooks, for exploring the new thoughts and imaginations of new authors you can buy eBooks, or to let other people read your imaginations or to share information with people you can write your own eBooks.