Online content for the "Microservices Architecture" Book
Read more in the API Academy blog series for O'Reilly that accompanies the book...
"The Three Pillars of Microservice Culture" by Mike Amundsen - https://www.oreilly.com/ideas/three-pillars-of-microservice-culture
"Shift Complexity to Where It Belongs" by Irakli Nadareishvili - https://www.oreilly.com/ideas/microservices-shift-complexity-to-where-it-belongs
"Optimize for Desirable Results" by Ronnie Mitra - https://www.oreilly.com/ideas/optimize-for-desirable-results
"Microservices Needs Architects" by Matt McLarty - https://www.oreilly.com/ideas/microservices-need-architects
Also, check out the two part Infoworld series on microservices origins...