Where’s Waldo. A Charlie Brown Christmas. The MapQuest Road Atlas.

On the face of things, these books don’t seem to have very much in common, save for, perhaps, their innocuous content. But there’s something much more serious linking them: They’re just some of the 11,850 books banned in Texas prisons by the Texas Department of Criminal Justice (TDCJ), according to the Texas Tribune.

In 2011, the Texas Civil Rights Project put together a comprehensive,searchable list of all the books and reading material banned across the state prison system and argued that the TDCJ’s extreme censorship is violating the Constitution.

But according to the TDCJ, the ban ensures publications don’t “incite tensions.” Per spokeswoman Michelle Lyons, “It’s not a matter of picking books we like and don’t like. It’s a matter of maintaining a safe environment.”

And six years later, you’ll still find Charlie Brown on the no-no list. Because nothing is more dangerous than a group of kids picking the smallest, meanest looking Christmas tree and giving it all their love.

According to the New York Times, censoring reading material is still considered a “matter of safety” for the almost 150,000 inmates across 50 state prisons: “The reviews are conducted not by guards but rather by mailroom staff members who skim the pages looking for graphic sexual content and material that could help inmates make a weapon, plot an escape or stir disorder.”

But the ban is inconsistent at best: books like Mein Kampf, Che Guevara’s Guerrilla Warfare — which instructs readers on how to make their own mortars — and even books by white nationalists, like the KKK’s David Duke are all permitted. But a book of Shakespeare’s Love Poems & Sonnets is off limits because of a nude portrait. At least one book by humorist Carl Hiaasen is banned, because, according to the TDCJ, it “contains information about manufacturing explosives.” Bret Easton Ellis’s American Psycho is allowed. While The Color Purple is banned for incest, Lolita, which depicts pedophilia, is fair game. Freakonomics is banned specifically for their chapter on race.

The inconsistent nature of what books are banned is not only arbitrary — it also hurts the inmates. Per the Times, inmates struggle to read or suffer from illiteracy at far higher rates than the general population, and reading increases their chances of assimilating back into society once released.

Study after study shows that reading can change inmates’ lives for the better. Reading in general has immense benefits, including improving emotional skills and mental wellness, reducing stress, and strengthening analytical skills. Take Where’s Waldo, for instance. It has been shown to help develop cognitive processes in the brain. It can also fine-tune emotional processing. Maybe more Waldo is just what the inmates need.