Windows PowerShell 3.0 First Steps (Developer Reference)
Ed Wilsonis a well-known scripting expert who delivers popular scripting workshops to Microsoft customers and employees worldwide. He's written several books on Windows scripting, including Windows PowerShell 2.0 Best Practices, Microsoft Windows PowerShell Step By Step,  and Microsoft VBScript Step by Step. Ed is a senior consultant at Microsoft Corporation and writes Hey, Scripting Guy!, one of the most popular TechNet blogs.