Join world-famous detective Sherlock Holmes and his ever-loyal sidekick Dr. Watson as they embark on a daring adventure.

Before Julia Stoner died, she heard a strange whistle. Now her sister Helen has started to hear the same sound. Can our celebrated sleuth solve the mystery before Helen suffers the same fate as her sister? The game is afoot!

This exciting tale has been retold and adapted with new illustrations, making it perfect for younger readers. Adaptated by children's fiction author Alex Woolf, it will delight bright young things aged 7+.