The Adventurers and the City of Secrets, Paperback/Jemma Hatt

Two master criminals are on the run with ancient treasure, using London's web of hidden trails and passages to conceal their loot. The Adventurers must track them down using their wits, Uncle Logan... and a stolen red bus. Join Lara, Rufus, Tom, Daisy and Barney as they race to uncover the City of Secrets