tag @a[hasitem={item=cubed:book_page_0_1,location=slot.weapon.mainhand}] add has_book
tag @a[hasitem={item=cubed:book_page_2_3,location=slot.weapon.mainhand}] add has_book
tag @a[hasitem={item=cubed:book_page_4_5,location=slot.weapon.mainhand}] add has_book
tag @a[hasitem={item=cubed:book_page_6_7,location=slot.weapon.mainhand}] add has_book
tag @a[hasitem={item=cubed:book_page_8_9,location=slot.weapon.mainhand}] add has_book
tag @a[hasitem={item=cubed:book_page_10_11,location=slot.weapon.mainhand}] add has_book
tag @a[hasitem={item=cubed:book_page_12_13,location=slot.weapon.mainhand}] add has_book
tag @a[hasitem={item=cubed:book_page_14_15,location=slot.weapon.mainhand}] add has_book
tag @a[hasitem={item=cubed:book_page_16_17,location=slot.weapon.mainhand}] add has_book
tag @a[hasitem={item=cubed:book_page_18_19,location=slot.weapon.mainhand}] add has_book
tag @a[hasitem={item=cubed:book_page_20_21,location=slot.weapon.mainhand}] add has_book