A setup with ...d6, ...Nf6, ...Nbd7, and ...e5. Black often aims for the ...c6, ...a6, and ...b5 expansion. Modern/Old Indian Hybrid
Instead of long forcing variations, you learn typical plans, pawn structures, and standard maneuvers.
You use the same starting move against 1.e4, 1.d4, 1.c4, and 1.Nf3.
The book covers about 200 pages of manageable knowledge, minimizing the need to study hundreds of pages for different systems.