Quote:
Originally Posted by Lesi
Why are ebook file sizes a) so huge, and b) so different from each other?
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Almost always the answer is images. Very rarely, the formatting of the text may be so swollen by unnecessary markup that it affects the size.
ePubs are just zip files by another name, so you can unzip a renamed copy and find out what's making the book files so big.
For example, the most recently bought book I have is Dean Koontz's
The Bad Weather Friend. A novel of around 330 pages in paperback. The AZW3 download from Amazon is 1.1MB, the converted ePub is 933KB. Expanding the ePub gives a 1.6MB folder, of which 733KB is text, 556 KB is images, 188KB is fonts and 122KB is the cover image.
You can examine your books similarly.