Yes, there are some "little Houska twists" in this book. They reminded me a little of "the Twist," which was popular when I was younger (shake it up baby).
This is an excellent book on how to play the Caro-Kann (1 e4 c6) defense for Black. There are other books out there, of course. There are authors such as Joe Gallagher, Anatoly Karpov, Gary Kasparov, and others. But if you want to play the Caro-Kann, get this one. It has some great explanations of the main concepts behind the defense against each of the main White lines. And I think it has a terrific choice of lines (as long as they keep working). It is a repertoire book for Black, so you have to decide if you like these particular lines. Houska has checked her lines with a couple of chess engines such as Fritz 9, which is somewhat reassuring.
Jovanka Houska tries to show us lines where Black can play for a win, not just for a draw. And she covers the main line (2 d4 d5 3 Nc3 dxe4 4 Nxe4), the Panov (2 d4 d5 3 exd5 cxd5 4 c4), 2 c4, the Exchange Variation (2 d4 d5 3 exd5 cxd5 4 Bd3 Nc6 5 c3), the Advance Variation (2 d4 d5 3 e5), the Fantasy Variation (2 d4 d5 3 f3), the Two Knights Variation (2 Nc3 d5 3 Nf3), the King's Indian attack (2 d3), and some unusual (and even very unusual) variations.
An example of an unusual line is 1 e4 c6 2 f4 d5 3 e5 dxe4 4 Ng5 Nf6 5 Bc4 Bg4? (Houska recommends 5...e6, which is good for Black.) 6 Bxf7+ (sacrificing the Queen!) 6...Kd7 7 Qxg4+ Nxg4 8 Be6+ Kc7 9 Bxg4. I wouldn't want to have this position for Black!
The Fantasy Variation is actually very dangerous, and an example is 1 e4 c6 2 d4 d5 3 f3 dxe4 4 fxe4 e5 5 Nf3 Bg4 (Houska warns us that 5...exd4? is a horrible error) 6 Bc4 Nd7 7 O-O Ngf6 8 c3 Bd6 9 Qb3 O-O 10 Qxb7 (I think Black is okay after 10 Ng5 Bh5 11 Qxb7 as well) 10...exd4. Black should be able to hold this, but the line is very tricky, and Houska has some useful recommendations here.
I tried one of Houska's suggestions after reading this book. 1 e4 d5 (I usually play 1...e5, often leading to the Berlin Defence against the Ruy) 2 exd5 Nf6 3 c4 c6 (for the previous three decades, I'd played 3...e6, the Icelandic Gambit, here and you will soon see why.) 4 d4 cxd5 5 Nc3 (the Panov) 5...Nc6 (Houska chose the line I used to play, which is why I bought the book!) 6 Nf3 (Houska has a good chapter on how to defend against 6 Bg5 here, which I like because her lines rarely get one into an isolated Queen pawn position and even more rarely into one where Black has to play ...g6.) 6...Bg4 7 cxd5 Nxd5 8 Qb3 Bxf3 9 gxf3 Nb6 (Houska stays with my old line) 10 d5 (the author has a good section on how to defend against 10 Be3, which I once got into trouble against) 10...Nd4 11 Qd1 (again, there is a good section on how to defend against 11 Bb5+, which I also got into trouble against in the past) 11 ...e5 12 dxe6 fxe6 13 Be3 Bc5 14 b4 (a defense is given against 14 Bg2, which also got me in trouble in the past) 14...O-O 15 bxc5 Nxf3 16 Ke2 Qf6 17 cxb6 Qxc3! (this is the move I should have played over thirty years ago, instead of 17...Rad8 18 Qc2 Nd4+) 18 Rc1 (the author shows how Black gets what I consider to be an advantage after 18 Bg2 or 18 Bh3.) 18...Qb2+ 19 Qc2 Qb5+! (Houska recommends 19...Nd4+ here, leading to a draw by perpetual check, but I decided to play for a win.) 20 Qc4 Qh5 21 Bh3 Ne5+ 22 Bg4 Nxg4 23 Qxe6+ Kh8 24 Rc5 Ne5+ 25 Kd2 Rad8+ 26 Kc2 Rfe8 27 Rxe5 (if 27 Qb3 Qf5+!) 27...Qe2+ 28 Kb1 Rxe6 29 Rxe6 Qb5+ 30 Ka1 Qd5! 31 White Resigns. Thank you, Jovanka!
I recommend this book.