I don't want to spoil the impact of the first few chapters, but the broad strokes are that Long was a Brooklyn firefighter, BQ marathoner, & Iron Man who got run over by a bus in December 2005 & suffered a litany of absolutely horrific injuries. The book chronicles is journey from a miserable, barely recognizable, barely functional, physical & mental wreck of a human to, well, the guy on the cover of the book. (I won't spoil the ending any more than that.)
So yeah. I've basically decided I don't really get to feel discouraged about anything ever again.
There are a few things about the writing & Long's personality that kind of bug me (particularly with regard to how he seems to view women), but the story itself is just so overwhelmingly incredible that I can't really deduct more than, like, a quarter of a star.