Julianne Moore wrote that it was “a great shock” to learn that the actress’ children’s book Freckleface Strawberry was among those recently banned by the Department of Defense under the Trump administration.

On Friday, the nonprofit group PEN America noted how Moore’s book, as well as No Truth Without Ruth about Ruth Bader Ginsburg and author Amy Ellis Nutt’s Becoming Nicole were banned by the DoD following a “compliance review.”

“Just weeks after the Trump Administration claimed book bans were a ‘hoax,’ the same administration is purging books from schools run by the Department of Defense, serving 67,000 children around the world,” PEN America wrote on social media.

“A memo sent to Defense Department schools obtained by the Guardian also demands that school documents use the word ‘sex’ not ‘gender,’ prohibits email signatures with personal pronouns, and instructs schools to stop celebrating cultural observances including Black History Month.”

By Sunday, news of the ban reached the Oscar-winning actress, whose first book, the semi-autobiographical children’s story Freckleface Strawberry, was published in 2007.

“It is a great shock for me to learn that my first book, Freckleface Strawberry, has been banned by the Trump Administration from schools run by the Department of Defense,” Moore wrote on social media. “It is a book I wrote for my children and for other kids to remind them that we all struggle, but are united by our humanity and our community.”

Moore, who grew up an “army brat” on various military bases, added, “I am particularly stunned because I am a proud graduate of Frankfurt American High School a #DOD school that once operated in Frankfurt, Germany. I grew up with a father who is a Vietnam veteran and spent his career in the #USArmy. I could not be prouder of him and his service to our country. It is galling for me to realize that kids like me, growing up with a parent in the service and attending a [DoD Education Activity] school will not have access to a book written by someone whose life experience is so similar to their own.”

The Department of Defense did not specify why Freckleface Strawberry was among the books targeted in the Trump administration’s crackdown, and Moore herself couldn’t pinpoint what was “so controversial” about her book that it necessitated a ban.

“I am truly saddened and never thought I would see this in a country where freedom of speech and expression is a constitutional right,” Moore added.