Searching for by John Carnell often leads to GitHub , where you can find both the official source code and community-shared copies of the book in PDF format. Official Source Code Repositories
PacktPublishing/Microservices-with-Spring-Boot-and ... - GitHub spring microservices in action pdf github link
If you need the actual PDF for reading, the following sources are verified: Manning Publications Searching for by John Carnell often leads to
If you're interested in learning more about Spring Microservices, here's a step-by-step guide to get you started: spring microservices in action pdf github link