What's a good middlegame strategy book?

What's a good middlegame strategy book? I'm talking about the times when you get into a solid position, but your opponent is equally solid and you have no idea what to do. There are no clear tactics, or clear weaknesses (that I can see).

Well, take that back, I need a book that will teach me how to see the weaknesses that are always there :-) I'm also not very good at figuring out "what my opponent is thinking".

Thanks!

When you start understanding what logical plans are and what big weaknesses are you will start to "know what your opponents are thinking" more. 

A good book to start out with would probably be pawn structure chess by soltis

Sometimes there is really no weakness. You need to induce one! Other times there is a weakness but there is no way of exploiting it.

Silman's book "how to reassess your chess" is good. But there is no such thing as 100% knowing what to do in all situations.

************please don't follow the advice below. It is better to have a bad plan than no plan at all. But I want to share my experience that it can happen to any players.***

In some games, I was completely outplayed. If I don't even know what to do, I just put my least active pieces into better squares.Sometimes, I even move pieces back and forth and just see what my opponents do. I hope that they mishandled their attempts to attack me.

The Art of Attack in Chess... A must read!!

I understand your mid game angst.  It sounds simple but things like keeping your bishop lines open, pawns connected and developing while threatening will cause you win games.  Play solid and develop smart and you will no doubt have enjoyable midgames.  As to what your opponent is thinking.. I always know what my weak squares are, play like he does to!  If your early play is smart then just threaten as soon as possible, tempo is way important. 

THE ART OF ATTACK IN CHESS!  Skip the books on classic opening theory until you are of the skill to need them.  Most players can be easily thrown off by aggressive early play. 

Simple Chess by Michael Stean.   Quite possibly the most meaty value-for-page book of its size (a quarter of size of the loftier texts on the subject of strategy)!

Nimzovich and Kotov and even Kmoch's books couldn't explain color weaknesses to me but one paragraph in SImple Chess made even my slow moving brain see the light :)

Wow, I've never seen such good reviews on Amazon for a book like "simple chess". It sounds like a diamond in the rough to me. It's on my Christmas list :-)

Really is ... one of those "I finally get it now! duh!!!" books.

I second these comments,Steans book is great.

Peter Romanovsky, Chess Middlegame Planning

Excellent! Romanovsky (1892-1964) impacted the old Soviet School in a positive way, helping its players achieve world dominance.

It's not a textbook, but David Bronstein's Zurich 1953 has a lot of interesting tips about weak colour complexes, pawn structures, bad bishops, etc.  Nimzowitsch's My System, Euwe and Kramer's The Middle Game, Pachman's Complete Chess Strategy and John Watson's Secrets of Modern Chess Strategy are other good books.

IMO Modern Chess Strategy by Ludek Pachman gets my vote for best middle game book but it's in descriptive notation, I don't think there's an algebraic edition.

Stean's Simple Chess is also very good and Silman's How to Reassess Your Chess is very good. Silman's soon coming out with an new edition of How to Reassess Your Chess that should be interesting.