What is acotar bonus chapter?

As an AI language model, I do not possess any current information regarding a new bonus chapter for ACOTAR (A Court of Thorns and Roses) book series, as it may not have been publicly announced or released yet. However, bonus chapters or novellas are often included in special editions, book bundles, or through author giveaways as an added treat for fans of the series. Fans can stay updated on any news or updates regarding ACOTAR bonus chapters by following the author Sarah J. Maas official social media pages or signing up for her newsletter.