Start with high-confidence how the human body works books, then narrow by subgenre or adjacent topics.
Human Anatomy
Frederic H. Martini, Robert B. Tallitsch
The Story of the Human Body
Daniel E. Lieberman
Anatomy Coloring Book, the
Wynn Kapit, Lawrence M. Elson
The Spark of Life
Frances Ashcroft
Human Anatomy Coloring Book: an Entertaining and Instructive Guide to the Human Body - Bones, Muscles, Blood, Nerves, and How They Work
Margaret Matt, Joe Ziemian
Immune
Philipp Dettmer
Human Body Coloring Book
DK, D.K. Publishing
Breath Taking
Michael J. Stephen
The Body
Bill Bryson
Evolution Gone Wrong
Alex Bezzerides, Joe Knezevich
The Sports Gene
David Epstein
Understanding the Heart
Stephen Hussey
Fascia - What It Is, and Why It Matters, Second Edition
David Lesondak