Start with high-confidence heart health books, then narrow by subgenre or adjacent topics.
NO More Heart Disease
Louis Ignarro
Fast Facts About EKGs for Nurses
Michele Angell Landrum
Preventing & Reversing Heart Disease for Dummies
James M. Rippe
Practical Cardiovascular Medicine
Elias B. Hanna
The Simple Heart Cure
Chauncey Crandall
Understanding the Heart
Stephen Hussey