Update README.md

Added Karate book link to the references section.

README.md

@@ -357,6 +357,7 @@ For teams familiar with or currently using [REST-assured](http://rest-assured.io
 * [Karate entered the ThoughtWorks Tech Radar](https://twitter.com/KarateDSL/status/1120985060843249664) in 2019 and was [upgraded in ranking](https://twitter.com/KarateDSL/status/1262719979104817152) in May 2020
 * [マイクロサービスにおけるテスト自動化 with Karate](https://speakerdeck.com/takanorig/microservices-testing-automation-with-karate) - (*Microservices Test Automation with Karate*) presentation by [Takanori Suzuki](https://twitter.com/takanorig)
 * [7 New Features in Karate Test Automation Version 1.0](https://software-that-matters.com/2021/01/27/7-new-features-in-karate-test-automation-version-1_0/) - by [Peter Quiel](https://twitter.com/peter_quiel)
+* [Writing API Tests with Karate](https://www.softwaretester.blog/writing-api-tests-with-karate) - book by [Benjamin Bischoff](https://www.softwaretester.blog/about), Packt Publishing, 2023
 
 You can find a lot more references, tutorials and blog-posts [in the wiki](https://github.com/karatelabs/karate/wiki/Community-News). Karate also has a dedicated "tag", and a very active and supportive community at [Stack Overflow](https://stackoverflow.com/questions/tagged/karate) - where you can get support and ask questions.