When Jack rescues a wounded cat, he quickly suspects foul play. Could there be a wildlife criminal on the loose in Briddvale? Jack rushes to investigate, determined to catch the culprit, only to stumble into a deepening mystery and a sinister criminal plot. Can Jack and The Twitchers stop the villains before it's too late? Spark is a page-turning autumn mystery adventure about courage, friendship and protecting our planet, perfect for readers 9+ and for fans of Robin Stevens, David Baddiel and Jenny Pearson. It can be enjoyed as a stand-alone adventure or read as part of The Twitchers series. Praise for The Twitchers: "A skilfully crafted mystery adventure. A clarion call for environmentalists everywhere.