Legion’s ‘The World’s Angriest Boy in the World’ is a very real book that you can’t buy

After introducing a book called The World’s Angriest Boy in the World in the second episode of Legion and showcasing it again last night, people have begun to ask if the children’s book in question is real.

Turns out it is, but fans won’t be able to buy it from Amazon or Barnes & Noble anytime soon. In an interview with The Hollywood Reporter, Dan Stevens (who plays David Haller on the show) confirmed showrunner Noah Hawley sat down to write the book. Stevens added that a hard-copy version of the book exists, and Hawley and the team use it on set as reference when they’re filming.

“Noah Hawley essentially wrote the world's most twisted children's book for our show,” Stevens said. “There was a physical copy, and it was useful. I love buying books for my kids, and it was a great sort of object to open up. It continues to feature quite strongly, both the book and the character of The World's Angriest Boy in the World, which is my favorite title of any book.”

In the show, the book reappears in Haller’s memories revolving around his father. The World’s Angriest Boy in the World, as one would imagine based on the name of the book, is a macabre and twisted story that Haller’s father would read to him. Haller couldn’t see his father’s face the first time the book makes an appearance in his memory, so the vivid artwork is what Hawley focused on.

When asked is he thought the book might ever be released to the public, Stevens said the network would probably find a way to produce it and tie it into the show. He did, however, question whether the disturbing book should ever be sold in the same section of a bookstore that sells more pleasant, typical children’s books.

“I wonder if they're going to publish it,” Stevens said. “I imagine they will! But it would be a little weird if it ended up on some child's bookshelf. Scratch that. That's an awful idea.”

Legion airs Wednesday nights at 10 p.m. ET on FX.