Episodes suggesting a friendship
- In Insectophobe's Nightmare 3, they both want to be in Pencil's Alliance, they were accepted, but as alternates.
- In Get in the Van, they both go to FreeSmart's dance party (The Clubhouse of Awesomeness). Book asks Ice Cube if it's exciting. When Pin yells at Book because she think that Book is manipulating Ice Cube, Ice Cube takes all of her power to yell at Pin, explain the she wanted to go with Book, not Pin.
- In the Long-lost Yoyle City, Book tells Ice Cube that they've reached the Yoyle Mountain summit.
- In FreeSmart Van and FreeSmart Supervan, Book was sitting next to Ice Cube.