Update readme.md

The book was released

readme.md

@@ -65,7 +65,7 @@ The term was coined by Eric Evans in his book of the same title.
 - [Introducing Event Storming: An act of Deliberate Collective Learning](https://leanpub.com/introducing_eventstorming) - The deepest tutorial and explanation about EventStorming, straight from the inventor.
 - [Microsoft .NET - Architecting Applications for the Enterprise (2nd Edition)](https://www.amazon.com/Microsoft-NET-Architecting-Applications-Enterprise/dp/0735685355/) - A software architect’s digest of core practices, pragmatically applied.
 - [Patterns, Principles, and Practices of Domain-Driven Design (1st Edition)](https://www.amazon.com/Patterns-Principles-Practices-Domain-Driven-Design/dp/1118714709) - Methods for managing complex software construction following the practices, principles and patterns of Domain-Driven Design with code examples in C#.
-- [Secure by Design (early access)](https://www.manning.com/books/secure-by-design?a_aid=danbjson&a_bid=0b3fac80) - Shows how to use Domain-Driven Design to avoid security vulnerabilities.
+- [Secure by Design](https://www.manning.com/books/secure-by-design?a_aid=danbjson&a_bid=0b3fac80) - Shows how to use Domain-Driven Design to avoid security vulnerabilities.
 - [Specification by Example](https://www.manning.com/books/specification-by-example) - This book distills from the experience of leading teams worldwide effective ways to specify, test, and deliver software in short, iterative delivery cycles. Case studies in this book range from small web startups to large financial institutions, working in many processes including XP, Scrum, and Kanban.
 - [Versioning in an Event Sourced System](https://leanpub.com/esversioning) - Have you had troubles with versioning an Event Sourced system? Just getting into a new Event Sourced system for the first time? This book is the definitive guide of how to handle versioning over long periods of time.
 - [What is Domain-Driven Design?](https://learning.oreilly.com/library/view/what-is-domain-driven/9781492057802/) - A quick read exploring the core patterns and principles of Domain-Driven Design, as well as strategies for applying DDD in brownfield projects.