This document provides instructions for using BookRoll, an e-book reading application, and its associated recommendation system. The key steps are: 1. Sign in and open BookRoll. 2. Select an e-book to read from the UOSAKI_CALL library. 3. Click the "R" button to open the recommendation system, which displays the current book and related knowledge nodes and websites. 4. Click knowledge or related knowledge nodes to learn more about related topics, or select a website node to get additional information. Nodes linked to important pages are prioritized.