Sigil is a Windows application that lets you easily change the EPUB file format or the like, as if it were any other text editor, you can also create your own ebook documents. Imagine finding a book on the Internet, but not in the EPUB format with Sigil you can copy all the text and to create your eBooks easily read.
Then it works like any other text editor with the basic options of these programs.
Sigil is free Sigil
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