Added "gRPC Microservices in Go" book (#120)

* Added "gRPC Microservices in Go" book

Added "gRPC Microservices in Go" book

* typo fix

README.md

@@ -211,6 +211,12 @@ Some of the key things this book will teach you are how to write Go software to
 
 By the end of this Go for DevOps book, you'll understand how to apply development principles to automate operations and provide operational insights using Go, which will allow you to react quickly to resolve system failures before your customers realize something has gone wrong.
 
+### [gRPC Microservices in Go](https://shortener.manning.com/44lB)
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+<img src="https://images.manning.com/360/480/resize/book/0/fb100d0-fa71-4eb2-bbd9-572eadb5b3a4/Babal-MEAP-HI.png" width="120px"/>
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+For the last decade, we have heard stories about Monolith to Microservice transitions and we might think that this transition solves the majority of the problems in the organizations. However, it might end up with mess if you are not aware about best practices of this transition, since Microservice Architecture comes with its challenges. In this book, we start covering production grade best practices of Microservices Architecture and explain when to use it. Then we talk about microservice communication patterns where gRPC comes to the stage. You will see complete examples written in Go with Hexagonal Architecture applied to project structure. You will not only learn how to implement microservices, you will see how to write tests, maintain quality with proper CI, deploy to Kubernetes environment and finally set up an observable system to have better monitoring for your application.
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 **Advanced Books**
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