Actress Woodley of 'The Fault in Our Stars' at Caesars Palace in Las Vegas
Actress Shailene Woodley arrives for a 20th Century Fox presentation of "The Fault in Our Stars" in Las Vegas, Nevada in this March 27, 2014 file photo. In a summer of blockbusters with superheroes, a rampaging monster and a wicked fairy, "The Fault in Our Stars," the film adaptation of John Green's best-seller, is a heart-wrenching story of young love that could become a box-office hit. REUTERS

John Green has mixed feelings regarding the decision to ban his "The Fault in Our Stars" novel by a school district. He took to his Tumblr page to express this, after a fan asked him straight out about it.

The book in question dealt with hard and real stuff that schools are in a conundrum in: should they allow students to read about death, cancer, and sex? Apparently, the Riverside California school system is not comfortable with the idea and banned the bestselling YA novel from a middle school library.

The decision was cinched after the Riverside Unified School District's book reconsideration committee voted six for and 1 against the banning for the title from the Frank Augustus Miller Middle School's library. Three existing copies of the book were removed as a result. The committee had to vote on the matter after a parent lodged a complaint. According to Karen Krueger, she was shocked that the book can be freely accessed to by adolescents as young as 11 to 13 years old.

Asked if he's hurt or angry about the decision, John Green posted on Tumblr that he's both happy and sad.

"I am happy because apparently young people in Riverside, California will never witness or experience mortality since they won't be reading my book, which is great for them. But I am also sad because I was really hoping I would be able to introduce the idea that human beings die to the children of Riverside, California and thereby crush their dreams of immortality," the prolific author wrote.

Since 1988, "The Fault in Our Stars" would be the second book that the school system has banned among the 37 complaints. The first book banned was Robert Cormier's "The Chocolate War." This was back in 1996.

The news that John Green's book is going to be removed ironically fell on the Banned Books Week, a week where librarians and booksellers focus on the issue of controversial books and whether it's beneficial to ban them.

This is hardly the first time that Green has to face some controversy over his books. The first novel published by the author, "Looking for Alaska" was also challenged for featuring controversial topics such as drugs, alcohol, smoking and sex. It made it to the list of most challenged books of 2013, alongside "Fifty Shades of Grey," "Hunger Games," and "The Adventure of Captain Underpants."