What is the fine-grained topic of the following text: In this, the conclusion to the sweeping Perilous Realm trilogy, Will and Rowen journey through the Shadow Realm–a wasteland of deserted cities and abandoned belongings–to rescue Rowen’s grandfather, the loremaster Nicholas Pendrake, and confront the evil Malabron once and for all. Only return the topic.
Conclusion of the Perilous Realm trilogy