Substitute 15.b3 Nxe4 for 15.Qd3 above and it makes sense.  See p93 of the book.

Thanks, after writing the post I decided to call them. They said it was considered lost and they would send another copy with free 2 day delivery.

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Where did you read that? On Amazon is only the 2006-paperback ...

Regards

Well, 12. a4 b4 13. Nb1 looks awful to me even without resorting to ...g5. Certainly 12 a3 or 12 Qh3 looks more natural.

Well, part of it is g5 in order to control the e5 square, which isn't all together uncommon.

I did not include in The Safest Sicilian the most obvious reply 22 h4 to 21 f3 h5!, because I thought that everybody would check it first and engines will find 22...Qb6 23 c5 Qxb2, so I focused on more unclear variations. It is impossible to give tons of variations everywhere. More important is to show the idea (21...h5 with a kingside attack) and the evaluation. Before I found 21...h5 Delchev also thought White was better.

Pantu, I do not know about any Rizzitano's improvements. As a newer book, it should have some, but I'm not aware of them. For instance, in the Watson review that you mention, there are 2 "improvements":
1) 1 e4 c5 2 Nf3 e6 3 d4 cxd4 4 Nxd4 Nc6 5 Nc3 Qc7 6 Be2 a6 7 0–0 Nf6 8 Be3 Bb4 9 Na4 Be7 10 Nxc6 bxc6 11 Nb6 Rb8 12 Nxc8 Qxc8 13 Bd4 c5 14 Be5 Rb6 15 Qd3 16 Bxg7 Rg8 17 Bb2 Rd6 18 Bd3 c4 19 bxc4 Qc6 20 g3! Ng5 21 f3 h5 22 h4. I have not Rizzitano's book (we bought one copy for Khalifman who is writing Anand 9, but as far as I know, he did not find the refutation of Taimanov there and had to exert his own brain), but since 21...h5 was my idea, I'm curious to know where is White's advantage after 22 h4 Qb6+ 23 c5 Qxb2 24 cxd6 Bxd6. I suppose White can make a draw with a couple of precise moves, but that is hardly an improvement.
The same applies to:
2) 15 Qd3 d6 16 Bc3 0–0 17 b3 d5 18 exd5 Nxd5 19 Be5 Rd8 20 Qg3 f6 21 Bb2 Bd6 22 Qg4 Qc7!? 23 Qxe6+ Kh8 24 Kh1 Bxh2 25 Qf5 Be5 Delchev likes this for Black.
Now the "improvement" is 26 Bd3 g6 27 Bxe5 Qxe5??. If we play cooperatively, White will enjoy an advantage, sure, but what about 27...fxe5 28 Bc4 Rf8. Do you like White's castling position? 

When writing the book, we had no Rybka, but anyway, it is better to use for evaluation one's own head and use computers to check this evaluation, not vice versa.