Cover: Generally, it is directly related to the content of a book, such as a book that studies historical documents. The cover is usually based on some screenshots of ancient books, with the title, author, publishing house and other related information written on it. And font is also a factor to consider. If you study classicism, then the fonts are usually the unique fonts in ancient calligraphy, such as running script and official script.
Back cover: Generally, there are few contents, including designer's name, editor's name, bar code, book number, pricing, etc. In addition, the design of the background pattern of the back cover needs to be integrated with the front cover to form a unified style and make it complete.