Good Books on 1.d4 Nf6

It's about twenty years since I last played the King's Indian with any regularity - partly because an accelerated KID - i.e. The Leningrad - entered my repertoire and partly because I lost a couple of times to the Benko variation, where white castles short and then confronts the black pawn storm with the annoying g2-g4! I assume that black has either found something, or more likely white players have forgotten about that possibility due to the plethora of good lines vs the KID.

Anyway, as I haven't kept up with the Indian defences, I'll just mention a few titles that look interesting to me.

Chess Explained: The Queen's Indian by Peter Wells. The QI is probably the main line opening that has the least written about it compared to how popular it is in GM-practice! The last decade or so it seems to have developed from a Karpovian drawing weapon to a very dynamic and tricky strategic opening. Though the drawback of the QI, and its brother the Nimzo Indian, is in my opinion that it allows the Torre Attack (1.d4 Nf6 2.Nf3 e6 3.Bg5) when black has a hard time getting any counter play without taking too big risks in the process.

Beat the KID: Three Lines Against the King's Indian by Jan Markos. The selected lines seem to be:
i) The Romanian variation 5.Nf3 0-0 6.h3 is the current favourite among the top guys I think.
ii)6.Be2, 9.Ne1 & 11.Be3 entering 'the variation of Death' (as it was known back when I played the KID) is usually the main motivator *why* people play the KID in the first place!
iii) And the Bayonet with 9.b4 - the reason many abandoned the KID about ten years ago.

(Aug12th09)King's Indian: A Complete Black Repertoire by Victor Bologan. If you've played the KID for a while and want to get a reliable repertoire for black in that opening against strong opposition, then this is thebook for you! Actually, if only this had been available back when I went from the KID to Leningrad Dutch, I'd probably still be playing the KID myself.
Bologan in this book has a very impressive style of coverage. Hardly any !,?,!?,?! have been added without a lot of consideration before, and if he writes some text comments (not very frequently) it usually conveys an (perhaps slightly laconic) insight that is quite helpful. So, the book is *not* like the majority of chessbooks nowadays, where one side can get five "!"s and still only be equal, and very little space is wasted on stuff like "and White is slightly better" when "+=" will do. And as cream on the cake, the book is written by a very strong GM who is one of the very top KID players!
Personally, I got it as I wanted to prepare for taking up 1.d4 again, and several times I've looked up variations that seemed like good unusual weapons, only to find that he'd seen it and done it before - sevral times the 'promising' line actually turned out to not only be mentioned, but also be =+ or -/+ even after double checking the analysis with an engine. Btw, when clicking in the variations it's quite useful to have Fritz 11 or Rybka 3 on stand by - to quickly check unmentioned variations - usually that will explain why they weren't mentioned.
So, if you play the KID from either side, this book is a must. If I had to mention something negative, it would be that his English can be slightly 'overworked' at times - but compared to some other chess writers from the former eastern block, his english is really excellent, so this is a very minor point. Rating 5/5

(Added Sept 8th 2009) By the way, the publisher has added a chapter online about 9.exd5 which was overlooked somehow. So now you can take a look for yourself or just update your book, here: 9.exd5

Well, that's all so far. We'll see if there'll be more books worth mentioning in the coming book flood...