Ember's End: The Green Ember Book IV is the fourth and final book in the main Green Ember series. It was written by S. D. Smith and illustrated by Zach Franzen. It was originally planned to be officially released on Amazon by Story Warren, LLC, on April 14, 2020, but due to numerous requests for a sooner release date, Story Warren and Smith moved the date to March 31.[4] S. D. Smith's store put a hold on shipping due to the COVID-19 pandemic, but Amazon began to ship on March 31.[5] Copies pre-o