Reflect that PHP 7 is now here, add a book

- update/tidy references to version numbers
- think "Modern PHP" should be on the list (I didn't write it, so can suggest without any bias)

_posts/16-10-01-Books.md

@@ -5,9 +5,7 @@ anchor:  books
 
 ## Books {#books_title}
 
-There are a lot of books around for PHP but some are sadly now quite old and no longer contain accurate information.
-There are even books published for "PHP 6" which does not exist, and will not now ever exist. The next major version of
-PHP will be named "PHP 7" because of those books.
+There are many PHP books; sadly some are now quite old and no longer accurate. In particular, avoid books on "PHP 6", a version that will now never exist. The next major release of PHP after 5.6 was "PHP 7", [partly because of this](https://wiki.php.net/rfc/php6).
 
 This section aims to be a living document for recommended books on PHP development in general. If you would like your
 book to be added, send a PR and it will be reviewed for relevancy.
@@ -23,6 +21,7 @@ for modern, secure, and fast cryptography.
 
 * [Build APIs You Won't Hate](https://apisyouwonthate.com/) - Everyone and their dog wants an API,
 so you should probably learn how to build them.
+* [Modern PHP](http://shop.oreilly.com/product/0636920033868.do) - covers modern PHP features, best practices, testing, tuning, deployment and setting up a dev environment.
 * [Building Secure PHP Apps](https://leanpub.com/buildingsecurephpapps) - Learn the security basics that a senior
 developer usually acquires over years of experience, all condensed down into one quick and easy handbook
 * [Modernizing Legacy Applications In PHP](https://leanpub.com/mlaphp) - Get your code under control in a series of