Exchange novels usually involved the exchange of a currency or item. The characters could obtain better development and opportunities by exchanging different items or currencies. Here are some redeemable novels that might meet the requirements: 1 << Money System >>: This novel tells the story of a fictional currency system where characters can obtain better development and opportunities by using different currencies to exchange for goods or services. 2. The Exchanger: This novel tells the story of a character who can exchange for different items or currency to obtain better development and opportunities. He realized that he could change his fate by exchanging for different items. 3." Unlimited Exchange ": This novel tells the story of a character who can obtain better development and opportunities by exchanging different items and resources. He discovered that he could change his fate and even control the entire world by exchanging for different items. [Item Exchanger]: This novel tells the story of a character who can improve his abilities and obtain better development and opportunities by exchanging different items. He realized that he could change the fate of himself and others by exchanging for different items. 5." Exchange War ": This novel tells the story of a character who can obtain better development and opportunities by exchanging different items and resources. He discovered that he could change the entire world's war situation by exchanging for different items.