Earning badges and exploring the vast wilderness is exactly what Hilda has been waiting for as the newest member of the Sparrow Scouts. Armed with her trusty sketchbook and a fierce curiosity, she is eager to document every magical creature in the valley while finally making some human friends. But her exciting outdoor expedition is suddenly cut short when rumors of a dark, menacing creature lurking near Trolberg force everyone back to the safety of the city. Of course, safety is rarely on the agenda when you are an adventurous blue haired heroine. You will follow Hilda as she discovers that mysteries exist everywhere, even in the mundane corners of Trolberg. Strange things are happening indoors, and a bizarre phenomenon is causing socks to vanish without a trace all across town. This thrilling illustrated chapter book perfectly captures the wonder of the animated series. You will need a keen eye and a brave heart to help Hilda connect the clues, confront the shadows, and uncover the secret behind the missing socks.