Share this Page Discover Like Books Books similar to The Unknowns: A Mystery Other books by Benedict Carey Other books with same Classifications Mystery English Language Arts Math Other books with same Subjects Mathematics Mystery and detective stories Missing persons Conspiracies Children's Books/Ages 9-12 Fiction Trailer camps Missing persons--Fiction Mathematics--Fiction Conspiracies--Fiction Juvenile Fiction | Mysteries, Espionage, & Detective Stories Trailer camps--Fiction Other books with same Awards Mathical Book Prize Other books with similar Lexile levels Lexile Range 650L - 950L