To ensure that readers can easily follow the contents of the Delo Knowledge series books, I have divided them into two main eras: the ancient era, consisting of three books numbered one to three, and the modern era, comprising books numbered four to nine. The Ancient era books primarily focus on learning methods and discoveries, while the current era books aim to establish and confirm various concepts.
However, all modern-era books from number four to eight have a consistent format in their introductions and conclusions, setting a unified tone for the entire series across all collections, so readers do not need to search for these messages in different books. Therefore, I apologize if readers find this repetitive. Nonetheless, my intention is to convey a definitive message to you, using two different tones—one of friendship and the other of combat—that symbolizes the battle between intellect and thought.
Regardless, my purpose is to awaken you with a slightly louder voice, providing warnings before entering hazardous stations that Earth may encounter.