Does Rowson's Chess for Zebras count as a middlegame book?? rather liked that one. 

over the years, i've browsed through most titles and own several. I thought Secrets of Chess Intuition by Beliavsky was full of strikingly well-chosen examples, albeit short.

Of Beim's various works, think Lessons in Chess Strategy is best (IQP section is very good), its old fashioned training material, but its this type of book that gives you solid grounding in basics. 

CUrrently working through Hansen's Improve Your Positional Chess which i could imagine would have been a godsend for me a few years ago. i don't really agree with some of his evaluations now (okay he is some more elo than me, but am still not 100% convinced!). Anyway more important is that the examples are chosen well and thought-provoking. Watson loved this book and i can see why, Hansen chooses alot of modern games which show typically modern play.

The above are the books that i've used to select examples for my club's training sessions. 

Eingorn's (Decision Making) and Romero's (Creative Chess Strategy) require one to put alot of effort, definitely not the type you can read on the bus, so they are sitting on my shelf at the moment most of the time.
 
There are others, especially tactics ones like Lemoir's stuff, but i don't find that type of books very exciting.

Hello,

Well I can confirm that "Secrets of Attacking Chess" by quess who?!,  is very good. So far, only looked at detail at the section on Tal v Korchnoi, nice illustrative comments on why Tal peformed so badly. (As a side interest quite interested in the Open Ruy and Frence  defences involved.) Also the section, on Geller's attacking technique was pretty good. Most of the content is complete games of famous players of the past. (Not so well known games, at least to me). Also, some of Marin's own games.
                Have browsed most of the other ones at a friend's house. All are at least good. Would also recommend some of quality chess books. Talking about them, sorry a bit off topic, are due to release in a few months, book of the World Chess Tournament in Argentina last year. Should be worth getting, although haven't heard of the author's.

Bye John S