Colorado’s Rebecca Yarros was already a staggeringly successful New York Times best-selling author when Amazon announced Monday that it is planning a TV series based around her latest fantasy novel, “Fourth Wing,” and its sequel, “Iron Flame,” which is due out Nov. 7. But the news reinforced Yarros as a force in global publishing, with 25 weeks on The New York Times best-seller list (13 of those weeks at the No.