Hi Folks!
Regarding Videki's English, 'entertaining' is the appropriate term
!
But to me, the lay-out is just horrible. Fortunately, there's a German version of the book, which is much more readable. The book is a nice overview of the Alekhine, but often very superficial (especially in the older lines).
Bagirow's classic "Aljechin-Verteidigung" from 1979 is more dependable in a lot of cases. 8)
This one has probably never appeared in English.
At least I only know of the Russian and German editions.
4 ... Nc6 is one of my favourite lines! Kaissiver calls it the Haakert-Variation. Haakert himself calls it the suicide-variation. He's been playing it for decades and most likely knows what he's talking about!
The Kaissiber-article is a must for everyone who wants to play. It contains an awful lot of stuff; yet there's still a lot to analyze. This line is fun (and sometimes horror!)
both in analysis and on the board (if you dare play it!).
After 5 c4 Nb6 6 Be2, ...Bg4 should be okay. It probably tends to transpose to the exd6-Exchange. Compare it with the line 4 Nf3 Bg4 5 Be2 Nc6!?!, when White's best is sopposed to be 6 0-0.