The haunted library - There's a ghost in the attic

Kaz isn't an ordinary boy – he's a ghost. And Klara isn't an ordinary girl – she can see ghosts. That makes their detective agency perfect for solving mysteries! This time, their investigation takes them to the neighbour's attic, where spooky sounds have started to emerge. To make things more mysterious, Kaz spots a dog through the window that looks just like his ghostly canine friend, Cosmo. They'll have to leave the safety of the library and venture outside. But how can they stop Kaz from being blown away by the wind again?