You wouldn't have had to read too much of this blog to know that I've regularly recommended PowerShell books by Don Jones and Tobias Weltner. They've announced the availability of a new free ebook that they've co-authored, called Secrets of PowerShell Remoting.
Remoting is one of the most powerful features of PowerShell, but it's not necessarily the simplest area to understand. In Windows Server 2012, PowerShell remoting is enabled by default, so now is a good time to get up to speed.
Head over to powershellbooks.com for the download links.