There is a novel in which there is something about a contract book

The term " contract grimoire " usually appeared in fantasy, fantasy, science fiction, and other novels. It referred to a mysterious book with powerful power. It recorded various magical powers and skills that could allow people to obtain extraordinary strength and strength. In some novels, the contract grimoire was a treasure that some powerful mages or Xianxia characters held. They could use the power and skills in the contract grimoire to cast all kinds of magical spells and skills to control and dominate the world. However, the power of the contract grimoire was also very powerful and dangerous. Some people who had the contract grimoire might use its power to pursue their own interests or even harm others. Therefore, in novels, the contract grimoire was often seen as a dangerous power that needed to be used with caution.