If you're looking for a bulk/combined package – here's where all of these are listed.

Learn Spring (30% off)

Learn Spring 5 and Spring Boot 2 from no experience to actually building stuff.

REST With Spring (30% off)

Build Your REST API with Spring 5 from HTTP fundamentals to API Mastery.

Learn Spring Security (30% off)

THE unique Spring Security education if you’re working with Java today.

Learn Spring Data JPA (30% off)

Master Spring Data JPA and boost your productivity with a modern persistence framework.