The brand new series from Zoe Sugg and Amy McCulloch Illumen Hall is an elite boarding school. Tragedy strikes when the body of a student is discovered at their exclusive summer party - on her back is an elaborate tattoo of a magpie. When new girl Audrey arrives the following term, running from her own secrets back home in America, she is thrown into solving the case. Despite her best efforts to avoid any drama, her new roommate Ivy was close to the murdered girl, and the two of them can't help but get pulled in. The two can't stand each other, but as they are drawn deeper into the mystery of this strange and terrible murder, they will discover that something dangerous is at the heart of their superficially perfect school. Welcome to The Magpie Society. One for Sorrow will be told via the alternating first person perspectives of the lead characters Audrey - written by Amy - and Ivy - written by Zoe - with the narrative being jointly plotted by both authors.

Audrey and Ivy, determined to bring their fellow student Lola Radcliffe's killer to justice, find themselves in the middle of another mystery when a friend disappears in suspicious circumstances. Their only clue is a mysterious card left by the enigmatic Magpie Society. With time running out and the police baffled, Audrey and Ivy must delve deeper than ever into the dark secrets that their school is hiding. But someone is playing a deadly game. And to beat them, Audrey and Ivy have to start rewriting the rules...