|“||At the heart of nature's mystery lies another mystery.||”|
Perplexus Anomalous is an Italian peculiar cartographer who is best known for creating the Map of Days, a collection of maps that show the location of every loop throughout the Peculiardom. Not only was he a cartographer, but also a philosopher, and great thinker, as Millard admires him greatly. Perplexus Anomalous's name is on the hard cover edition of Hollow City.
|“||You are an ignorant pig!||”|
–Perplex Anomalous, Library of Souls
The Italian peculiar, after much speculation over his location, had actually been imprisoned by Caul. While in Caul's clutches, Perplexus was tortured for the location of Abaton, or, the Library of Souls. Perplexus did successfully find the location of Abaton. According to Millard, Perplexus had been living in a 14th-century loop in Venice that no one had known existed before Caul had captured him. In the book, Perplexus aged while he was in Devil's Acre, his hair and beard turning white. Later, when Millard was trying to return him home, his hair and beard returned to their previous color over the course of a few days, and that is how Millard realized that the loop collapsing had reset their ages.
- He is not an ymbryne; Ransom Riggs said it in the live video of Facebook of June 22, 2017
- His name, Perplexus, is most likely an alias, as the name is derived from the word "perplex", which is defined as 'To make complicated or confused as a matter or question'.
- His name, Anomalous, is probably derived from anomaly, which means something that deviates from what is standard, normal, or expected.
- He is cross-eyed.