Can you solve the world's most baffling mysteries? This hi-lo collection explores 12 real-life unsolved cases--from vanishing ships and ghostly twins to cursed craters and disappearing treasure. Packed with eerie details, strange clues, and fascinating theories, each story delivers middle school content at a 4th-grade reading level. Perfect for curious tweens and reluctant readers, this collection will keep them guessing--and turning pages--until the very end.The accessible layouts feature self-contained chapters, a table of contents, captions, glossary, index, and extra book and website resources.