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Several years later...

Tomasso is bitter over his failure to locate the ancient book and find another magic spell. He and Leonardo have grown apart, never to be real friends again.

For Tomasso there is comfort in a happy household. But this too comes at a terrible cost. Driven by grief, he risks everything to follow Leonardo’s path to present-day London.

Handsome and charming as ever, Tomasso quickly manoeuvres his way into Hornsey House Museum. Cate is enthralled and Bernard suspicious. But neither sees that Tomasso is mad with vengeance, or that they have crossed paths with him before...

This is Fionn's worst birthday yet. That creepy old homeless man is following him again. There is no refuge at home, where Fionn's mother doesn't want him or the memory of his dead father. But Fionn finds what surely must be a gift from him father: a deadly-looking knife with a strange inscription. Fionn's friends know what knives are for, but the knife is not what is seems, and it has plans of its own...