Lois Lowry's YA dystopian novel, The Giver, introduces readers to a future world where life is controlled by Community leaders and every member of the Community does what s/he is told. Lowry published the novel in 1993 and it went on to win a Newbery Medal the next year.
Following the success of The Giver, Lowry wrote three more novels which loosely take place in the same era, Gathering Blue (released in 2000), Messenger (released in 2004), and Son (released in 2012). Together, the books are referred to as The Giver Quartet.
In an interview with Indie Bound, conducted shortly after Gathering Blue's release, Lowry explained both The Giver and Gathering Blue are about children who are no longer free to become themselves once a society presses upon them the importance of coloring within the lines. She speaks specifically about the comparison of herself, as a children's book author, facing censorship and challenges during her career.
An interview conducted by The Atlantic after the release of Son confirmed that Lowry never intended to write any sequels to The Giver. She explains,
When I finished The Giver I said stupidly, publicly, that I wouldn't have any sequels. That was published in '93. In 2000 the second [Gathering Blue] was published. I had not intended it as even related to The Giver; I was creating another interesting world, to me, where things were different, and as I went along I realized I could answer some questions—in seven years, I had gotten so many questions about the ending. I put in, at the end of Gathering Blue, the reference to the boy Jonas. He was not mentioned by name, but kids who had been wondering recognized him.