Only knowing the content and the author without knowing the title could be found through the search engine. Enter the content and author's information in the search engine, such as the author's name, the theme or plot of the work, and then press the "search" button. Search engines usually return results related to books, including online book collections, library tables, social media posts, and so on. If you're using a mobile device, you can use an app to find books. For example, you could search for " novel name + author " in the app store to find related books. You can also find related books through social media platforms. For example, you could search for the author's name on Twitter or the title and author's name of the work on Douban. Other readers 'comments, recommendations, and reading notes on social media platforms may provide useful information. If you have a library card, you can try to find related books in the library. The library usually has a table of contents and index to help you find books related to a particular topic. You can also ask for help through the library's service phone or online service.