In Unexplained: Unsolved Crimes, readers in grades 5-9 will step into the world of unsolved crimes, where the trail runs cold and many cases remain open. From heists and murders to burglaries and beyond, these unsolved crimes have stumped even the most skilled investigators. The Unexplained series is designed for readers to be able to flip through until an image catches their interest. Each 32-page book includes spreads that feature a handful of info-packed sentences. Quick tidbits mean the book doesn't have to be read cover to cover, making this series perfect for reluctant readers.