International Master Maxim Chetverik's book covers the Bogo-Indian Defense which is normally arrived at after the moves 1.d4 Nf6 2.c4 e6 3.Nf3 Bb4+. This book additionally covers Catalan-Bogo hybrids, in particular, the Bogo response to the Catalan Opening with 1.d4 Nf6 2.c4 e6 3.g3 Bb4+.