* A specific book about the Orphan Train era: There are several books with titles that could be considered "Orphan Train Girl," such as "The Orphan Train" by Christina Baker Kline, "The Orphan Train" by Andrea Warren, or "The Orphan Train Girl" by Sarah Shaber.
* A fictional story or character: It could be a story about a specific girl who traveled on the Orphan Train, either written or being discussed.
To find out how many pages are in a specific book about the Orphan Train, you would need to provide the full title and author of the book you're interested in.