But, to reitterate what others have said, I very much suggest Silman. Not only has he revolutionized the way chess instruncion books are written, he has, (to a lesser degree,) changed the way chess strategy itself is looked at.
Also, he is one of those rare High-ranked masters who can take a complicated idea, and make it make sense. Even to us weekend pawn-pushers.
Plus his books are all large print. Very easy on the eyes.
LOL Shivsky
While I hate all rants on General Principle, I agreed with pretty much all you said there.
Despite myself.