The story of Pi, which Early derives from the digits in the number, is a recurring motif throughout the story. The number is first discussed in the boys’ math class, where their teacher calls it the holy grail of mathematics. This introduction sets up several things. Firstly, it introduces the idea of a quest, which lies at the heart of the book’s narrative; secondly, it hints at magical or fantastical elements present in the story, as pi is termed a “magical” number; and finally, it offers a glimpse into Early’s character, who storms out when Mr. Blane mentions pi ending.

The very first time Jack and Early interact, Early begins narrating the story of Pi to explain why the number does not end. The story holds several parallels between events in the main narrative. Some obvious ones are fantastical in nature: Pi sets off in a boat on the quest and has many adventures along the way, such as getting caught in a swarm of insects; getting picked up by pirates; narrowly escaping a volcano; getting lost in a maze and meeting the “Ancient One”; and eventually finding his way into the catacombs.