If you are a strong expert or better who already plays the Alekhine, this is not for you. The author makes no attempt to improve critical theory. Nothing to see here - move along.
For the rest of us this is an extraordinarily good book. I have Cox, Davies, and Bogdanov, and I would trade them all for this one, as good as they are. This is, in Taylor's words, "... a sound, but not too theoretical repertoire against everything White can throw at this defense...". What makes it so good?
1. It is practical. Taylor has chosen lines that are playable without resort to massive memorization. He accepts a couple forced draws by White, but prefers to play Chess rather than regurgitate it. It is not loose though. On the few occasions where explicit move order is necessary he is very explicit. Taylor is an IM. If the lines are good enough to challenge his opponents then they are good enough to challenge mine (and me). As he is too polite to suggest directly, I am not likely to play Anand any time soon.
2. It is personal. Taylor tells you how he feels about the opening - both lines he likes and lines he rejects - and he plays the lines he recommends. This gives the reader an opportunity to see the color of the opening - even if biased towards the author's viewpoint - and to judge the repertoire choices on a qualitative basis. It also means that you get a coherent aggregation of lines that are stylistically consistent and economical.
3. It is educational. The author instructs very well, and he does this through tightly selected illustrative games, an approach that I ordinarily think is much overrated, but here he succeeds through strict focus. I found it to be very well written.
4. It is thorough. The book includes substantial advice and preparation for non-critical lines. You know, the ones we face all the time. And the author makes a conscientious effort to consider almost all likely viable deviations.
5. It is focussed. This is a tight repertoire. Taylor only strays to compare his choices against alternatives where valuable. There is no iffing or butting. This is his repertoire and he hopes you like it.
6. It is flexible. Taylor isn't dogmatic about staying in pure Alekhine lines. There are occasional transpositions into favorable versions of the French, and he recommends the Vienna/Four Knights complex after 2.Nc3 (so does everybody else, but they don't offer any analysis).
7. It is human. The author writes in a personable style and makes you feel as if you are receiving personal instruction. There is occasional, but not distracting wit, and the odd anecdote.
The one criticism I have is that his coverage of the Vienna/Four Knights straddles the useful. It is better than nothing, but it is not enough. I think it would have been better to have invested the space in suggesting a thorough and coherent repertoire in those lines without analysis and referring the reader to other works, rather than the too few illustrative games we have. But that is being churlish.
This is a fine opening work, and the best repertoire book for the masses that I have ever seen. It isn't Shipov's Complete Hedgehog, but it doesn't try to be. The quality of opening books is increasing by the day - we are in a blessed time - and this entry belongs in the race.
Sometimes you get the impression that Chess authors write for themselves and their peers and not for their audience. Not Taylor. Congratulations, Sir.