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README.md

 ### PHP Books
 *Fantastic PHP-related books.*
 
+* [Domain-Driven Design in PHP](https://leanpub.com/ddd-in-php) - Real examples written in PHP showcasing DDD Architectural Styles.
 * [Functional Programming in PHP](https://www.functionalphp.com/) - This book will show you how to leverage these new PHP5.3+ features by understanding functional programming principles
 * [Grumpy PHPUnit](https://leanpub.com/grumpy-phpunit) - A book about unit testing with PHPUnit by Chris Hartjes.
 * [Mastering Object-Orientated PHP](https://www.brandonsavage.net/) - A book about object-orientated PHP by Brandon Savage.
 * [Signaling PHP](https://leanpub.com/signalingphp) - A book about catching PCNTL signals in CLI scripts by Cal Evans.
 * [The Grumpy Programmer's Guide to Building Testable PHP Applications](https://leanpub.com/grumpy-testing) - A book about building testing PHP applications by Chris Hartjes.
 * [XML Parsing with PHP](https://www.phparch.com/books/xml-parsing-with-php/) - This book covers parsing and validating XML documents, leveraging XPath expressions, and working with namespaces as well as how to create and modify XML files programmatically.
-* [Domain-Driven Design in PHP](https://leanpub.com/ddd-in-php) - Real examples written in PHP showcasing DDD Architectural Styles.
 
 ### Other Books
 *Books related to general computing and web development.*