Warning: Contains Spoilers for Invincible season 2, episode 4!

Omni-Man's books hold valuable information on defeating the powerful Viltrumites, making them sought after by various characters in the Invincible series. Nolan Grayson wants Mark to read his books not only to learn how to defeat the Viltrumites, but also to gain a new perspective on their strained relationship. Nolan's plea for Mark to read his books shows that he has fully changed his allegiance and turned against the Viltrum Empire, willing to abandon his post and requesting his son's help.

Omni-Man's books play a big role in Invincible season 2, episode 4, and here's what they mean and why he tells Mark to read them. Although Nolan Grayson is a superhero, he also has a secret life as a human, with him acting as an author in order to make money for his family. Although Nolan's books are rarely brought up in the series,...