The Spook's Mistake

Spook's, published as The Last Apprentice in the United States, is a children's dark fantasy series by the English author Joseph Delaney. It is published by imprints of Penguin Random House in the United Kingdom and HarperCollins in the United States. The series has been published in 30 countries, with sales exceeding 4.5 million copies. It began in 2004 with The Spook's Apprentice, which was later adapted as a play script, a feature film titled Seventh Son, and a French graphic novel.