Daisy Wells and Hazel Wong are spending the Christmas hols in snowy Cambridge. Hazel has high hopes of its beautiful spires, cosy libraries, and inviting tea-rooms - but there is danger lurking in the dark stairwells of ancient Maudlin College. Three nights before Christmas, there is a terrible accident. At least, it appears to be an accident - until the Detective Society look a little closer, and realise a murder has taken place. Faced with several...

Daisy Wells and Hazel Wong have returned to Deepdean for a new school term, but nothing is the same. There's a new Head Girl, Elizabeth Hurst, and a team of Prefects - and these bullying big girls are certainly not good eggs. Then, after the fireworks display on Bonfire Night, Elizabeth is found - murdered. Many girls at Deepdean had reason to hate Elizabeth, but who might have committed such foul play? Could the murder be linked to the secrets and...

Daisy Wells and Hazel Wong are famous for the murder cases they have solved - but there are many other mysteries in the pages of Hazel's casebook, from the macabre 'Case of the Deepdean Vampire', to the baffling 'Case of the Blue Violet', and their very first case of all: the 'Case of Lavinia's Missing Tie'. Packed with brilliant mini-mysteries, including two brand-new and never seen before stories, and peppered with Daisy and Hazel's own tips, tricks,...