:･ﾟ'☆📚Book📚｡:･ﾟ'☆

Book appears to be a hardcover book. The contents of Book can change depending on the situation. Among the books she has identified as hers are a dictionary with definitions for everyone else, a journal, an HPRC/HPHPRCC instruction manual, a collection of tips and tricks, an atlas of Yoyle City, a motivational quote booklet, an inclusivity guide, a copy of "Battle for Dream Island: The Official Character Guide," a catalog, a balancing guide, a grammar book, a chemistry book, a fashion magazine, a bestiary, and a diary. Her pages are white, and the cover features a pattern of earth and water. In "Lots of Mud," she appears with pages on a variety of topics. Notably, the page behind the cover, if torn off, reveals a crayon drawing of her face. In the "Last BFDI" clip, she has a page with Dora and her autobiography.

Book is sweet, polite, and caring towards most of the contestants. She doesn't seem to enjoy breaking the rules, as shown in "Dig Deeper." However, she can sometimes act arrogant, such as claiming she'll win Dream Island. She can also be passive and unable to stand up for herself or others, making her easily manipulated. An example of this can be seen in "No More Snow!" when she was about to go back for the tennis ball, golf ball, and Rocky, but Matchstick and Pencil laughed at her. Book also often serves as the voice of reason among the FreeSmarters. Despite being sweet and outgoing, she often uses these qualities to manipulate others and win challenges. One example is in "Argument Day," where Pencil manipulated Book into letting her into his pages, thus causing his team to lose the challenge. Although Book puts up a bit of a fight, he ultimately gives in to Pencil, causing their team to be stranded underwater. Book also has a tendency to get excited prematurely, as shown in several episodes. Because of this, she often lets her ego get the better of her. One example is in "Lots of Mud," where she unwraps Coiny's hand, grabs the key, and opens the final petal, pausing for a few seconds with a triumphant expression. Little did she know that she forgot to remove the final petal, which is why FreeSmart lost that episode. In "She Deserve It," Book seems to feel sorry for Leafy, despite the fact that she simply stole Dream Island from Firey to get revenge on him and selfishly didn't return it, leaving her no choice but to offer her the choice of either returning the island or leaving to distance herself from the others.