BookRix is a free site that lets you create and publish your own books online. You can upload, e-publish and share your work as well as have it read, reviewed and critiqued.
How does BookRix work? This video answers all of the questions you thought of, and some you probably didn’t.
Do be careful of some content, however, the code of conduct states that
contents which are pornographic, contain vulgar or obscene language or which are annoying or otherwise indecent or which constitute an incitement of masses, insults, deformation or which contain unobjective and false presentations of facts or which are qualified to be unconstitutional, extremistic, racist or xenophobic or which come from prohibited groups are prohibited.
Copyright and other issues are addressed here.