One Big Unicorn

One Big Unicorn is the puppet book written by Gru. It reflects on the story of Gru's life after he adopted the girls. He writes this book because the previous storybook, Sleepy Kittens, was destroyed maliciously.

He wants to show Margo, Edith and Agnes how much they have helped him, though he does not want to admit it, and claims that the girls have nothing to do with the making of the book.