You can often find this book as a via:

If White plays , you can play 3...e4 4.Ng5 f5 , grabbing space.

I cannot provide a direct PDF download link (copyright reasons), but searching for on legal platforms will find it.

In faster time controls, saving time on the clock during the opening is a massive advantage. You can play your first few moves instantly, while White must pause to consider which setup they are facing. The Core Pillars of the 1...d6 Repertoire