I think the book was previously published as "The Last Godfather". I read it and I know other members have as well. There's probably a review around here somewhere.

I think the title , whether it is "King" or "Last" is probably meant to be somewhat sardonic/insulting as in 'look how far these folks have fallen'. And of course the author/publisher just want to sell books..

"When the snows fall and the white winds blow, the lone wolf dies but the pack survives."
Winter is Coming

Now this is the Law of the Jungle—as old and as true as the sky; And the wolf that shall keep it may prosper, but the wolf that shall break it must die.
As the creeper that girdles the tree-trunk, the Law runneth forward and back; For the strength of the Pack is the Wolf, and the strength of the Wolf is the Pack.