Where does the book found by Margaret Peterson Haddix take place?

You're likely thinking of "The Book Thief" by Markus Zusak, not Margaret Peterson Haddix.

"The Book Thief" takes place in Nazi Germany during World War II. The specific location is Molching, a fictional town near Munich, where the story's main characters, Liesel Meminger and her foster parents, Hans and Rosa Hubermann, live.

Margaret Peterson Haddix is a different author known for her series like "The Missing" and "The Shadow Children".

Let me know if you'd like to know more about "The Book Thief" or any of Haddix's books!