Summary: An adopted 12-year-old boy suddenly discovers he is not who he thought he was.
Middle-grade books regularly have the concept that the main character is not who they thought they were, especially if they are orphans. This is a classic literary feature because it fits into middle-grade development. Of course, most readers will not be orphans who may secretly be important, but readers can still think about what it would mean to be someone else.
Orion Kim is 12 years old. He is handy with tools and can fix many things, but he is not very coordinated or popular. Very early in the book, he finds out that his grandmother is not his grandmother due to someone attempting to kill him and someone else defending him. Not long after, he finds out that he is not from Earth, but he is “starborn,” and he is taken away from the only home he has known (on Earth) and hides from his attacker on an alien world.
There are classic literary devices that work because they are classic. For example, middle-grade readers may already be familiar with characters attending a new special school to learn about their new powers. Or a group of characters working together to discover the things the adults around them won’t tell them. This is not to say that Orion and the Starborn is cliche; I don’t think it is. But as a nearly 50-year-old who has been reading middle-grade books for decades, I can see the literary references beneath the story.