Now Avrukh is back with an expanded, updated and revamped 1.d4 repertoire. Volume 1A deals primarily with the Catalan, which is an Avrukh specialty. In GM Simen Agdestein's words: "It's in Avrukh has become a standard comment for those trying to understand this opening."
This volume covers the position after the opening moves 1.d4 Nf6 2.c4 e6 3.g3, concentrating on the Catalan which arises after 3...d5, while also dealing with the Bogo-Indian with 3...Bb4+, and Benoni systems after 3...c5.