Energy Stones (ES) can be given to books in the What’s Next Section. The book that receives the highest cumulative Energy Stones for the week will be published the following Monday. You will get a fixed number of Energy Stones daily at 0:00 (UTC+8) based on your user level. Different levels receive different numbers of ES a day. The higher the level, the more the ES. You can raise your level through various actions. You can see the experience breakdown here.