What is a summary of Ulysses Moore the long lost map?

In "Ulysses Moore: The Long Lost Map," Ulysses Moore, a curious boy, receives an old map from his late grandmother. The map bears the clues to hidden treasures and the legacy of a long-lost adventure. Determined to uncover the secrets held within the map, Ulysses embarks on a thrilling quest alongside his skeptical older sister, Julia, and their resourceful friend, Penelope.

Following hints and puzzles found in books, Ulysses and his companions travel to various locations across the United States, each destination offering new adventures and challenges. They must stay one step ahead of a sinister organization known as the Covenant of the Lost, who are also hot on the trail of the map's secrets.

As Ulysses and his friends piece together the clues and uncover the truth behind the map, they discover that their journey is not only about treasure but about family bonds, friendship, and the power of believing in the impossible. Along the way, they encounter danger, betrayal, and unexpected allies, leading to an epic conclusion that reveals the true nature of Ulysses' grandmother's legacy.