In order to improve your knowledge of Spring Web MVC, Spring Security, Elasticsearch, and Apache FreeMarker, the following books are recommended to be read, as they will be helpful in the coming chapters:
- Spring 5.0 By Example: https://www.packtpub.com/application-development/spring-mvc-designing-real-world-web-applications
- Spring Security - Third Edition: https://www.packtpub.com/application-development/spring-security-third-edition
- Elasticsearch Essentials: https://www.packtpub.com/big-data-and-business-intelligence/elasticsearch-essentials
- Instant FreeMarker Starter: https://www.packtpub.com/web-development/instant-freemarker-starter-instant
