What is a summary of Fire Ascending by Chris D'Lacey?

"Fire Ascending" by Chris D'Lacey is the concluding book in the "Last Dragon Chronicles" series. It follows the protagonist, David Rain, as he navigates a world filled with dragons, magic, and perilous challenges. As the story unfolds, David must confront powerful adversaries and fulfill his destiny, all while grappling with themes of loyalty, sacrifice, and the importance of friendship. The novel weaves together threads from previous installments, culminating in an epic finale that explores the balance between light and darkness.