I've only read a little of Ash, which seems promising enough - I just couldn't wrap my head around it at the time, so I've put it aside for the time being and will pick it up again once I don't have quite so many other things on my mind.
Good idea - it's a book that deserves concentration, and once you get into it, you'll find that you start puttig off non-essentials (like food and sleep!) for a while.