The invention discloses a book. First subject content pages, second subject content pages and third subject content pages are laminated according to the page number. Each of the first subject contentpages, the second subject content pages and the third subject content pages can be bonded with and separated from the adjacent pages. According to the first bonding manner, the same second subject content pages and third subject content pages are bonded to the bottom faces of the corresponding upper adjacent first subject content pages. According to the second bonding manner, the first page of thefirst subject content pages is independent, and the third subject content pages and the rest of first subject content pages are bonded to the bottom faces of the corresponding upper adjacent second subject content pages. According to the third bonding manner, the first pages of the first subject content pages and the second subject content pages are independent or mutually bonded, and the rest ofthe first subject content pages and the second subject content pages are bonded to the bottom faces of the corresponding upper adjacent third subject content pages. Through the arrangement manner, different subjects of books can be integrated in one book, and students do not need to carry heavy schoolbags.