A terrible crime forces Lucy to turn to Lockwood for help, and sets them on the trail of dark secrets at the heart of London society.

Both professionally and personally, their investigation stirs up forces they may not be able to control... Ghouls and spectres, thrills and tension in this brand-new instalment in Jonathan Stroud's bestselling series. 'Stroud is a genius' - Rick Riordan, author of the Percy Jackson series.