Start with high-confidence psychology for teens books, then narrow by subgenre or adjacent topics.
Future Tense
Tracy Dennis-Tiwary
Unwinding Anxiety
Judson Brewer MD PhD, Judson Brewer
The Anxiety Audit
Lynn Lyons LICSW, Lynn Lyons
Freeing Your Child From Anxiety, Revised and Updated Edition
Tamar E. Chansky Ph.D., Tamar E. Chansky
Retrain Your Brain: Cognitive Behavioral Therapy in 7 Weeks
Seth J. Gillihan PhD, Seth J. Gillihan
The Anxiety Survival Guide for Teens
Jennifer Shannon LMFT, Doug Shannon
This Is What Anxiety Looks Like
David A. Clark PhD, David A. Clark
Rewire Your Anxious Brain
Catherine M. Pittman PhD, Elizabeth M. Karle MLIS
Rewire Your Anxious Brain for Teens
Debra Kissen PhD, Ashley D. Kendall PhD
Freedom From Anxiety
Paul McKenna, Headline Welbeck Non-Fiction