The book coins in the novel bookshelf were usually a virtual currency used to buy novels or other literary works. There were several ways to obtain book coins: 1. Points and Book Coins earned from reading novels: The author would usually leave some points and Book Coins for each novel he read. These points and Book Coins could be used to purchase other works on the novel shelf. 2. Book Coins for completing missions and activities: Some novel websites have various missions and activities. Completing these missions and activities can earn book coins or other rewards such as reading a certain number of chapters, completing certain challenges, etc. 3. Buy Book Coins from the novel bookshelf: Some novel websites allow users to buy Book Coins. Book Coins can be used to buy books on the bookshelf. It should be noted that the book coins on the novel bookshelf are a virtual currency. The actual value may not be as high as imagined, so you need to consider carefully when buying. In addition, different websites might have different rules and methods of using the book currency. You need to read the relevant instructions carefully.