Peter And The Shadow Thieves by Dave Barry

In this thrilling sequel, Peter and his friends embark on a daring adventure to London to thwart the sinister plans of the malevolent Lord Ombra, who seeks to harness the power of starstuff for his own dark purposes. As they navigate the bustling streets and shadowy alleys, Peter must confront new dangers and unexpected allies, all while grappling with the growing responsibilities of leadership and the mysteries of his own past. With courage and wit, the young heroes strive to protect the magical substance that holds the fate of the world in its shimmering grasp.