Looking for the name of a book I once read.?

I read a book a while back, and although I'm sure the name was Monument, I can't find it anywhere. The book is about a large ugly vagrant with a name I cant remember. He is not the ideal hero. Ugly, fat, mean, dirty, homeless and thieving. But hes very strong and does in fact save the world at the end of the book, but dies by being cut nearly in half, then tackling the "evil" thing into a bottomless pit. Well... with that info I hope someone can tell me what the name is, and where I can find the book. Thanks