The novel of Portgas D. Ace in manga format, illustrated by Boichi (the illustrator of Dr. Stone).
For fans of visual storytelling, it is an exceptionally detailed black and white manga in English, in which the first volume recounts the events of Ace's journey as a pirate from the moment he acquires the mera mera no mi and how he builds his own crew, starting his career as a captain.
It is ideal for Ace fans as it is extra material that we have not seen in the canon manga and anime.