Avrukh's Catalan

Has anybody ever studied Avrukh's books? I searched through Internet and couldn't find any review showing what is right and what is wrong with his analysis and recommendations. Well, I have recently given it a try and felt something strange. I like books, I like my wooden board and pieces and I don't like to study chess with chess engines. But every now and then when I get that strange feeling I reach out silicon brains for help. Et voilà Avrukh's book on Catalan (2nd ed.) is starting to look like erm out in left field. Chapter 9 deals with lengthy variations after Nf6 e6 d5 4.Nf3 dxc4 5.Bg2 b5 c6?! (Avrukh totally ignores 6...Bb7 and that's just the first oddity) cxb5 8.Ne5 Nd5 (his rather odd recommendation he's eager to prove) 9...Bb7. But the black has the great alternative 9...a5 while 9...Bb7 is just bad. So all Chapter 9 dedicated solely to 6...c6 and 9...Bb7 starts to look irrelevant. Avrukh's Catalan books aim at the grandmaster level and I don't think any grandmaster (or any player who cares about their repertoire) would choose bad moves planning on 4...dxc4 with 5...b5 strategy. And it struck me that maybe all Avrukh books are full of mistakes and misdirections, eg Chapter 10 deals with Nf6 e6 d5 4.Nf3 dxc4 5.Bg2 a6 6.O-O Nc6 and Avrukh says that 7...Nd5 is not as bad as it looks and then discusses 7...Rb8 and 7...Bd7 without mentioning 7...Nd7 which is better than 7...Nd5 (actually even 7...e5 is better). Just for fun I decided to check up a random chapter of Avrukh's Queen's Gambit book. It was Chapter 7. After d5 c6 3.Nf3 dxc4 b5 e6 cxb5 he says 7...Nf6 is bad but my engine thinks it's the best move. Avrukh recommends studying 7...Bb4+ but what about a lot of other options, I want to be prepared playing as white (in Catalan book he duscusses a lot of bad moves for black to show how great his recommendations are). So all of a sudden I find myself having no trust in Avrukh. I don't want to waste my time checking up every line of his analysis. I think his books are of no use. Am I wrong? (I know this book kinda dated but I don't think this kind of mistakes were excusable in 2015.)