Bare bones HTTP/2 DTOs with no logic, just set/get methods and interfaces except one subparser utility
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 | Hacking APIs: Breaking Web Application Programming Interfaces (2022) by Ball, Corey J. |
 | Spring Boot 3 API Mastery: Write scalable, reactive, and secure APIs for microservices with Spring Boot 3 and Java 21 (English Edition) (2025) by Racca, Vincenzo |
 | API Design Patterns (2022) by JJ Geewax, Sarah Dawe, Manning Publications |
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 | Practical API Design: Confessions of a Java Framework Architect (2008) by Tulach, Jaroslav |