Here is a quick overview of all the books that I have published over the past years, both for free or for a publishing house
Administrating Skype for Business Server 2015 Step by Step for AnyoneGetting Started with FortiGateGetting Started with Microsoft Lync Server 2013Instant Microsoft Forefront UAG Mobile Configuration StarterLync Server CookbookMicrosoft Lync Server 2013: Basic Administration - Release 2.1Zen and the Art of Skype for Business Maintenance Version 1.0