You'll have to be more specific with your request.
Unlike monotheistic religions which, in general, have collected all of their myths, legends, and historically-informed stories into a single source (the Tanakh, Holy Bible, or Quran), there are many different mythological stories written in the Sumerian language and they don't always agree with each other. As a result, there isn't a "Bible" in our religion and we don't treat the myths as literal events.
Some of the more famous Sumerian myths are:
Beginning in the second millennium BCE, the Assyrians and Babylonians came to power in Mesopotamia. These two groups spoke a Semitic language called Akkadian and, like the Sumerians before them, they composed epical literature. As with Sumerian mythology though, these new stories also contradict each other at times, once again forcing us to approach them as literary rather than literal accounts.
Some of the more famous Akkadian myths are:
Unfortunately, translations of the Akkadian epics aren't as readily available for free online as the Sumerian ones. If you're interested in reading them I would recommend Benjamin R. Foster's book: Before the Muses, which, while expensive, contains translations of all of them, as well as dozens of other texts written in the Akkadian language.