Stump is an open source, self hostable, media server for your comic books, manga, and other digital books. It is designed to be easy to use and easy to deploy. The short on how it works:

Install and run Stump on a computer or NAS (Network Attached Storage). Configure your libraries (i.e. where your media lives), and Stump will take care of the rest. To read your media, you can use the web interface or any compatible client.