This books takes a deep dive into Tuplets, Polyrhythm and Metric Modulation.
The Tuplet Chapter lays out what they are and how to count them
The Polyrhythm Chapter shows how to take the Tuplets and play them
over two, three or four subdivisions of time.
The Metric Modulation Chapter explains what Metric Modulation is and shows a variety of
ways to apply this rhythmic concept to the drumset.
For more details and to see the table of contents go to Apple Book Store.