on 14 a3 he gives 14...-d5 Tratar-Kindermann Pardubische 2004.

I played the Leningrader for 4 years but about a year ago I gave it up.
In the meantime I even played 1.Nf3 f5?! 2.d3! as white and I am really convinced that black has problems there...
Now I am surprised to read that Kindermann advocates 8. ... Na6 (in the mainline) again.
I own the German edition of his book where he gave 8. ... a5 (which is absolutely not to my taste and one of the reasons why I don't play the Leinigrader anymore). In my opinion black loses too much time with this move and weakens the queenside so  that white has several promising continuations. This may be a bit negative, but after Na6, white has to be much more careful.
In his first edition he gives white an advantage after: 1.d4 f5 2.g3 Nf6 3.Bg2 g6 4.Nf3 Bg7 5.0-0 0-0 6.c4 d6 7.Nc3 Qe8 8.d5 Na6 9.Rb1 c5 10.dc6: bc6: 11.b4 Bd7 12.a3 Nc7 13.Bb2 Ne6 14.c5 += (Beliavski-Kindermann continued 14.a3 after which black should have no problems).
So what has been discovered in that line?
It might make me take up the Leningrader again!

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Mmmh, didn't Kindermann express a certain less-than-impressed attitude in the German edition about 1.d4 f5 2.Nf3 d6? He seemed to suggest 3.Nc3 was fairly pleasant for white. So how does he then suggest to proceed after 1.Nf3 d6 2.d4?

No, actually that seems to be the only set back for black. He actually recommends 1...d6 now! 

8...c6 is a slight improvement but Kindermann prefers white after 9.Bf4! (backed up with some analysis). There was a thread about this line here a while ago. Kindermann is more thorough though than the brief analysis in that thread.

Of course playing 1...d6 means that you have to prepare for 2.e4 also.

I have both editions. I have studied the german edition from cover to cover, but I only got the english version recently so I can't give more than my first impressions.

Kindermann uses the same main games. He has three new games: Beliavsky-Kindermann (with 8...Na6 in the main line, as an alternative to 8...a5), Hansen-Berg (with 7...Ne4 in the b3-system) and Carlsen-Dolmatov (in the 1.Nf3 f5 2.d3 system).

There are new analysis here and there. 9.Be3 Na6 in the main line has more analysis now. Also more is done on 8.Nd5 in the main line. (This line was also analysed in NiC yearbooks. Black seems to be doing fine after 8...Nxd5 9.cxd5 Nd7! Surely there are many more sections with new analysis. These were the ones that caught my eye.

I was a bit disappointed not to see any alternative to the forced draw in the 8.Qb3 line.

I'm sorry that I can't give more details and a general statement if it's worth buying or not. I have to read the book carefully first!