Why: The world that author Bunzl has created is one teeming with mechanical wonders - remarkable clockwork animals and beings that need to be wound with a key.

Together with Lily and Malkin, Robert goes on a quest to discover the mystery behind his family only to uncover dark secrets that plunge them further into danger. Robert discovers that the locket is a memento from his mother, who left him and his father when Robert was just a boy.

In Moonlocket, Robert’s past catches up with him when a criminal mastermind, the Jack of Diamonds, breaks out of prison and appears at his father’s workshop searching for the mysterious Moonlocket. As they begin to figure out who the men chasing them are and their reasons for doing so, Lily also uncovers the truth about her family. They also find a friend and ally in newspaper reporter, Anna. Thankfully, she doesn’t have to face them alone - she has the help of Robert, the clockmaker’s son, and Malkin, her mechanical fox. She is stalked by silver-eyed men who will do anything to get their hands on one of her father’s mechanical inventions, the eponymous Cogheart. What: Set in a vivid steampunk Victorian era England, Cogheart is the story of spunky Lily Hartman, whose life gets thrown upside-down when her father mysteriously goes missing. The third book is slated to come out some time in 2018. Cogheart is his debut children’s novel, and Moonlocket is the second book in the series. Who: Peter Bunzl is a BAFTA-award-winning animator, as well as a writer and filmmaker.