In fact lookimng closer at Rock Guitar 1 there is a whole section on Rock Rhythym.

Rock Guitar follows this up with a whole chapter called "More Rock Rythym"

Blues 1 has CHAPTER 4: BLUES RHYTHM AND FEEL

Blues 2 CHAPTER 5: RHYTHM, TURNAROUNDS, AND ALTERNATIVE FORMS

Country 1 has CHAPTER 2: ELECTRIC RHYTHM TOOLS – VOL 1. and VOL 2

Country 2 has CHAPTER 3: RHYTHM GUITAR TECHNIQUES

CHAPTER 4: PICKING AND STRUMMING: SIGNATURE RHYTHM

CHAPTER 5: COUNTRY RHYTHM GUITAR LIKE THE MASTERS

So, there is plenty to go at