A story of the Knights of the Round Table, and the search for the Grail, except the Knights are no storybook knights but possessed of strange abilities, and the grail grants a power beyond imagining. This is a story you have to pay attention to - the main character lives in a fractured timeline, so things are never straightforward. It took me a few tries to get into it, and I think it would benefit from re-reading when I was less distractable, but even though I didn't entirely get it, I could sense that there was a nugget of something very interesting at its core.