RobH_en_tn/exo/32/33.md

that person I will blot out of my book

The phrase "that person" represents "that person's name." Alternate translation: "I will erase that person's name from my book" (See: rc://en/ta/man/translate/figs-metonymy)

my book

This refers to the book of Yahweh that Moses spoke of in Exodus 32:32.