Formats
There are a variety of e-book formats used to create and publish e-books. A writer or publisher has many options when it comes to choosing a format for production. Every format has its proponents and champions, and debates over which format is best can become intense.
Comparison of e-books with printed books
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Advantages
* Availability- There are over 2 million free books available for download as of August 2009.[18] Mobile availability of e-books may be provided for users with a mobile data connection, so that these e-books need not be stored on the device. An e-book can be offered indefinitely,
without ever going "out of print".
* Portability and Storage- In the space that a comparably sized print book takes up, an e-reader can potentially contain thousands of e-books, limited only by its memory capacity. If space is at a premium, such as in a backpack or at home, it can be an advantage that an e-book collection takes up little room or weight.
* Language Accessibility- E-book websites can include the ability to translate books into many different languages, making the works available to speakers of languages not covered by printed translations.
* E-Reader Attributes- Depending on the device, an e-book may be readable in low light or even total darkness. Many newer readers have the ability to display motion, enlarge or change fonts[19], use Text-to-speech software to read the text aloud for visually impaired, partially sighted, elderly or dyslectic people, search for key terms, find definitions, or allow highlighting bookmarking and annotation. Devices that utilize E Ink can imitate the look and ease of readability of a printed work while consuming very little power, allowing continuous reading for weeks at time.
* Costs- While an e-book reader costs much more than one book, the electronic texts are generally cheaper. Moreover, a great share of books are available free of charge. For example, all fiction from before the year 1900 is in the public domain. Also, libraries lend more current e-book titles for limited times, free samples are available of many publications, and there are other lending models being piloted as well. E-books can be printed for less than the price of traditional new books using new on-demand book printers.
* Security- Depending on possible digital rights management, e-books can be backed up to recover them in the case of loss or damage and it may be possible to recover a new copy without cost from the distributor.
* Distribution- Compared to printed publishing, it is cheaper and easier for authors to self-publish e-books. Also, the dispersal of a free e-book copy can stimulate the sales of the printed version.[20]
* Availability- An e-book can be purchased/borrowed, downloaded, and used immediately, whereas when one buys or borrows a book, one has to go to a bookshop or library during limited hours, or wait for a delivery.
* Environmental Concerns- The production of e-books does not consume paper, ink, etc. Printed books use 3 times more raw materials and 78 times more water to produce albeit they do not require a machine for use[21]
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