I have an ebook in EPUB format.

I want to publish it online as a set of interlinked HTML pages (what may be better than EPUB for both online readers and search engines).

What (free) software (either running on a Linux server or creating static HTML pages on a Linux PC) can you recommend for creating this Web site from EPUB?

I am a programmer and can write something myself, but I would prefer ready to use and professional software.