Application for creating/read ePub

The program is designed for the creation and reading of electronic books.
Yes, the network has editors, for example, Sigil, but my is distinguished by a small volume, as well as the ability to work even from the flash.
The program creates books in the epub format for reading on mobile devices. You can also create for reading on a computer (here you can add javascript, but on mobile gadgets this functional work will not be). The program also opens the epub format and carries into its own library.
There is just a reader, that is, without the opportunity to create books - this is free.