Added periods to the list of the paid books

Author: dmitriifrlv

_posts/16-10-01-Books.md

@@ -24,12 +24,12 @@ for modern, secure, and fast cryptography.
 so you should probably learn how to build them.
 * [Modern PHP](https://www.oreilly.com/library/view/modern-php/9781491905173/) - 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
+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
-small, specific steps
+small, specific steps.
 * [Securing PHP: Core Concepts](https://leanpub.com/securingphp-coreconcepts) - A guide to some of the most common
-security terms and provides some examples of them in every day PHP
-* [Scaling PHP](https://www.scalingphpbook.com/) - Stop playing sysadmin and get back to coding
+security terms and provides some examples of them in every day PHP.
+* [Scaling PHP](https://www.scalingphpbook.com/) - Stop playing sysadmin and get back to coding.
 * [Signaling PHP](https://leanpub.com/signalingphp) - PCNLT signals are a great help when writing PHP scripts that
 run from the command line.
 * [Minimum Viable Tests](https://leanpub.com/minimumviabletests) - Long-time PHP testing evangelist Chris Hartjes goes over what he feels is the minimum you need to know to get started.