I hope for these additions, too (but I don´t expect them).

I don´t think that the Reti-Slav lines are objectively problematic for Black. You should look at lines like (1Nf3 d5)
(a) 2c4 c6 3b3 dxc4 4bxc4 e5
(b) 2c4 c6 3g3 dxc4
(c) 2c4 c6 3g3 Nf6 4b3 dxc4 5bxc4 e5
(d) 2c4 c6 3g3 Nf6 4Bg2 dxc4
(e) 2c4 c6 3g3 Nf6 4Bg2 Bg4 5Ne5 Be6
(f) 2g3 Bg4
I play all these lines and don´t have any problems. You must prepare it!

I´m much more concerned about 1Nf3 d5 2c4 c6 3e3 Nf6 4Nc3, when White still might want to continue with d2-d4 and Meran, Schlechter or ...a6 lines. To stay in a "real Slav repertoire" Black must play Bc8-g4xf3 lines, but White´s pawn structure is more flexible now (d2-d3).

Another move order problem is 1d4 d5 2c4 c6 3e3 (again looking for a Meran AND avoiding 3Nc3 dxc4), when a "real Slav player" must allow 3...Bf5!? 4cd cd 5Qb3 Qc7 6Nc3 e6 7e4?!, a very unclear and dangerous pawn sacrifice. Very few master games, some claim White winning, others Black winning. I´m curious about Vigus´ opinion.

Of couse the Panov is no problem at all for Black.

tracke 

After 1 c4 c6, white can play 2 e4, transposing the game to the Caro-Kann. I don't expect this book to cover this. However, it would't be that hard for this book to include the Slav as a response to the Reti Opening. 1 Nf3 d5 2 c4 c6 (or 1 c4 c6 2 Nf3 d5) and then the mainline is 3 g3 Nf6 4 Bg2 dxc4.

Well, I doubt most Blacks would want to face 1. c4 Nf6 2. Nc3 c6 3. e4.

I presume most Slav players would meet 1. Nf3 with 1...d5 (or, okay, 1...Nf6) and 1. c4 with 1...c6.

Does this book give any ideas on how Slav players should meet 1 c4 or 1 Nf3?

I've played 1.d4 d5 2.c4 c6 3.Nc3 dxc4 as black several times, without getting poor positions. I can't remember the lines given in Burgess' book as being that terrible for black.

3...Nf6 4.e3 e6 avoids the Bg5 lines in the semi-slav. I can't see it avoiding any lines in the Meran, though. 1.d4 d5 2.c4 c6 3.Nc3 Nf6 4.e3 e6 5.Nf3 is the Meran. 

One can add the Meran, Chebanenko or the Schlechter to the dxc4 slav repertoire for variety or to avoid certain move order problems. A book called "Play The Slav" should certainly focus on 3...dxc4, IMO.

Why don't you guys wait to see what James gives on 3...dxc4 before you just dismiss it out of hand.  Maybe he's got some interesting new ideas?!?   

Before Morozevich came along, any book that gave 6...Nbd7 instead of the Bishop-sac line would have been met with the same scepticism, but look at how things are now.  Maybe 3...dxc4 is set for a comeback.

Also, while I think White can maintain an edge against 3.Nc3 Nf6 4. e3 g6 (what I know as the Schlecter Slav), I don't really think it's as bad for Black as most of the books say.

agree that if there's ever a good time to transpose to Chebanenko, 3. Nc3 Nf6 4. e3 a6 must be it. 

@bibs: Not sure about other lingos, only read chess books in english. Anyway, always had an impression that the Slav is one of the more "secretive" openings, in the sense that authors and professionals tend to keep more secrets to themselves compared to other openings. Hope Vigus spills all the beans....

Some sources worth considering:
Rogozenko in recent CBM118 survey on 7... Nb6, quite upbeat on Black's prospects. 
Tactics in the Chess Opening 4, this had some interesting slav games, though not much you can't find elsewhere in say Informator/Chesspub.