(And perhaps, like Tamson House, this book knows its own. I recently discovered it on the bookshelf of a dear friend, when I remarked upon this, he said that he'd actually unintentionally liberated it from someone else - someone I'd given it to, who we now know did not deserve it, nor would he ever grok it. The friend who has it now - he groks.
So yeah. Maybe the book knows its own, and jumped from someone who didn't deserve it to someone who did.