Jen Hamilton

A No. 1 New York Times bestseller on a debut book is a genuinely rare thing, and Hamilton got there by doing something almost nobody in publishing does: she arrived with a five-million-follower audience built one blunt, useful video at a time. The credential stack behind it matters too. RN, BSN, CEN, and RNC-OB put her in a small group of creators who can cite both a bestseller list and an obstetrics certification.