Yes, I can recommend you a few books. The first was One Piece: Death's Vice-Captain, which told the story of the protagonist, Chen Qi, who transmigrated to the world of One Piece, obtained the Death System, and became stronger. Next was One Piece: I Have League of Legends, which told the story of the otaku King Tianyou who transmigrated to the world of One Piece and brought the League of Legends system with him. He began his legendary experience in the world of One Piece. If you prefer the Naruto theme, you can watch " The Shadow of the Fourth Generation of the Wood Leaf." It tells the story of the main character, Ember, who was reborn in the world of Naruto. He learned the godly Flying Thunder God and first-class sword skills, and pursued the story of becoming the sixth generation Naruto. I hope you like my recommendation.π
The characters included the male lead, Lei Yin, a low-key teenager who was both good and evil.
One Piece: God Level Naruto System by Xia Wanchun Feng. It was a light novel/derivative Doujinshi novel with transmigration, system style, black-bellied, big brain hole, and comics elements.
[User's recommendation: Poison tested, recommendation index: Two stars.]
I hope you will like this book.
In a fanfiction where Naruto is a fishman in One Piece, Naruto would face new challenges. For example, dealing with the discrimination that some fishmen face in the One Piece world. But he'd also have new opportunities. He could use his fishman physiology to swim faster and deeper, discover hidden treasures, and maybe even find a way to connect the ninja world with the pirate world. His Nine - Tailed Fox chakra might also have some interesting interactions with the strange powers in One Piece.
In the manga novel that was reborn in One Piece's world and ate the Sky-Devouring Fruit, the following plot could be used as reference:
The protagonist was reborn in the world of One Piece and obtained the ability of the Sky-devouring Fruit to become a demon-man who could devour the sky.
The main character in the world of One Piece launched a series of adventures and intense battles with other characters. He needed to constantly devour the sky to improve his ability and strength, while also dodging attacks from other characters.
In the process of adventure, the protagonist will encounter all kinds of dangers and challenges, but he will also continue to grow and improve, eventually becoming the most powerful demon in the world of One Piece.
One Piece Summoning System 74 Conspiracy was the name of a web novel. The summoning system was a setting in the novel that could summon various characters and weapons to help the protagonist complete missions. In this novel, the protagonist traveled to a world related to One Piece and received a summoning system to begin his adventure. The story contained a lot of fantasy elements, including pirates, magic, mythology, etc. It told the various challenges and opportunities that the protagonist encountered in his adventure.
Traveling to One Piece's world with a system would bring many new challenges and opportunities.
The system will help you master various skills and abilities such as combat skills, magic skills, scientific knowledge, and so on. He could use these skills and abilities to survive and adventure in One Piece's world.
He would interact with many different characters, including Luffy, Sauron, Nami, Usopp, Sanji, and so on. He would take risks with them to solve all kinds of problems and defeat powerful enemies to finally become the Pirate King.
However, he also needed to be careful to avoid falling into all kinds of traps and dangers. At the same time, he also needed to constantly learn and grow in order to continuously improve his ability and strength.
Traveling to One Piece's world with a system would be a journey full of adventure and challenges. He would become stronger, braver, and wiser.
One key element is the Devil Fruits. These fruits give extraordinary powers to those who eat them. Another is the different types of pirates, like the Straw Hat Pirates who are on a quest for One Piece. And the Marines play a role too, as they try to stop pirates.
The 'one piece system' in the One Piece novel is complex. It involves the concept of the grand line, where pirates search for the ultimate treasure, One Piece. The system also includes the various pirate crews, their hierarchies, and the unique abilities of the Devil Fruits that many characters possess. For example, Luffy's Gum - Gum Fruit gives him stretchy powers which are crucial in battles and his journey through the dangerous waters of the One Piece world.