The thrilling final installment in Amy Alward's magical Potion Diaries series! After finding her great-grandmother's potion diary, escaping the clutches of Emilia Thoth, saving her grandfather's memories AND become a Master Alchemist, surely it's time for Sam Kemi to have a good, long rest? And maybe, just maybe, a proper date with her boyfriend Zain? But now that Princess Evelyn is married to the sinister Prince Stefan and showing symptoms of the Gergon illness, it looks as though Sam's adventures are just beginning.The GOOD news: there might be a cure for the virus spreading like wildfire through the city. The BAD news? It’s buried in a remote village in a far-flung country next to an active volcano – and Sam’s not the only one after it. With a TV crew trailing Sam’s every move and time fast running out, it looks like things are about to… Go viral!