Four of the seven Trustees were defeated and lost their Keys. But the adventures of Arthur Penhaligon continue. His friends Susie and Fred are captured by the Piper, Excellent Saturday creates problems wherever she can, and Lady Friday takes thousands of people from Earth. What does she want from all these mortals and where is she sending them? Meanwhile, Arthur, the Piper and Excellent Saturday receive letters from Lady Friday. In them, she announces that she refuses the position of Trustee and is ready to transfer it to the one who first reaches the Scriptorium in the Middle House. It sounds like the perfect trap is in store for the volunteers... Garth Nix's books have long been appreciated by young fans of mysterious stories. However, adults also read them with pleasure. And it’s not surprising, because the fantasy worlds of Nyx are always unique, and the adventures that befall the heroes are unexpected every time. Lady Friday is the fifth book in the Keys to the Kingdom series.