Start with high-confidence dance workouts books, then narrow by subgenre or adjacent topics.
Yogilates(r)
Jonathan Urla
G-force
Gunnar Peterson
The Workout
The Pilates Body, Revised and Expanded Edition
Brooke Siler
The Pilates Body
Chair Pilates and Yoga
Harri Angell
Fusion Workouts
Helen Vanderburg
Ellie Herman's Pilates Props Workbook
Ellie Herman
Ellie Herman's Pilates Workbook on the Ball
The Women's Health Big Book of Pilates
Brooke Siler, Editors of Women's Health Maga
