Here's a description of Jujutsu Kaisen books 1-3:
Book Details
Volume 1: Ryomen Sukuna: Introduces Yuji Itadori, a high school student who becomes involved in the world of Jujutsu Sorcerers after swallowing a piece of the demon Ryomen Sukuna to save his friend from a cursed spirit. This volume sets the stage for the series' dark fantasy world.
Volume 2: Continues the story of Yuji and his friends as they navigate the world of cursed spirits and Jujutsu Sorcerers. The volume explores the consequences of Yuji's actions in Volume 1.
Volume 3: Further develops the story, introducing new characters and plot twists. The battle between Jujutsu Sorcerers and cursed spirits intensifies, putting Yuji and his friends in greater danger