Sometimes crimes are committed that never get solved and so they remain a mystery. Delve into the facts behind some of the world's most mysterious crimes including murder, theft and missing persons to find out what we do know about these cold cases and what the possible explanations could be.

Real (and possibly not so real) unexplained events are examined in the four books in this series. Strange disappearances, alien visitors, mythical creatures, messages from beyond the grave and strange places steeped in mystery all make an appearance (or should that be disappearance?!) in these fun and informative books.

This book features in the following series: Mystery Stories, The Mysteries .

There are 24 pages in this book. This book was published 2015 by Hachette Children's Group .

Katie Dicker is a writer and editor who has worked in publishing for over 15 years. She has a degree in politics and philosophy and specialises in children's educational publishing.

This book has the following chapters:

• 1: The criminal world
• 1: Deadly weapon
• 1: Mystery killer
• 1: Axe murders
• 1: Hijack thief
• 1: Missing baby
• 1: Mystery murder
• 1: Still searching
• 1: Glossary
• 1: Websites
• 1: Index