Complex sentence: The True Story of the Maverick Who Pioneered Open Heart Surgery, an account of the astonishingly unconventional guys who created open-heart surgery, notably the colorfully eccentric Dr. C. Walton Lillehei.
Split into simpler sentences: The True Story of the Maverick Who Pioneered Open Heart Surgery. It's an account of the men who created open-heart surgery, notably Dr. C. Walton Lillehei.