In order to read an Ebook, you need to have software that lets you read it. Be it a simple text file on a PC or a compressed document format on a handheld. There is no reader that can read all of the different formats. There is also no best format. Which reader to use basically comes down to personal preference based on what you need it for and what you want to pay for it. Each has its strengths and weaknesses. Click one of the links below to read more about the for that platform. There are a lot more than I have listed here. That is part of what makes everything so confusing. If you feel your favorite reader has been left out, let me know and I will add it.