The upstream git repository is here.
You can build documentation from a blivet git clone, or you can look at the (often outdated) version I have here
What's with the name?
The blivet is an optical illusion that displays two irreconcilable perspectives at once. This is apropos to a fully functional storage library in that the goal of clean, consistent design is virtually irreconcilable with the tangle of inconsistent storage technologies that must be managed.
But the term "blivet" has a negative connotation as well. Shouldn't you pick a different name?
No. If you don't have a sense of humor you must develop thicker skin. Seriously.