The Baru Cormorant books are a series of fantasy novels written by the American writer Seth Dickinson. Three books have been published so far:
The Traitor Baru Cormorant (2015)
The Monster Baru Cormorant (2018)
The Tyrant Baru Cormorant (2020)
A fourth and final book is expected to be published, but the title for it has not yet been announced. Fans have therefore speculated as to what the book will be called: https://st-just.tumblr.com/post/688896530819825664/what-do-you-think-baru-cormorant-4-will-be-titled#notes
This market resolves to the title of the next book, whenever it is officially announced. Note that the books were published with slightly different titles in the United Kingdom ("The Traitor" versus "The Traitor Baru Cormorant"); I will consider those to be equivalent.