This portable reference to Windows PowerShell 3.0 summarizes the command shell and scripting language, and provides a concise reference to the many tasks that make PowerShell so useful. If you’re a busy Windows administrator, and don’t have time to plow through huge books or search online, this is the ideal on-the-job tool. Written by Microsoft PowerShell team member Lee Holmes, and excerpted from his Windows PowerShell Cookbook, this edition offers up-to-date coverage of PowerShell 3.0. You’ll find information on the .NET classes and legacy tools you need to manage your system, along with chapters on how to write scripts, manage errors, and format output. Beginning with a guided tour of Windows PowerShell, this handy guide
Only a quick reference for powershell, but a good one for me: efficient and with some good examples. Be sure to look at the content to know if it has what you want: it neither list "standard" cmdlet (so it's not specific to administrator, poweruser or developper), nor explain how to create one with .NET.
Bad: About 50% of this book contains description of regular expressions, XPath, string formatting options and other topics that are NOT specific for PowerShell, but there is NO (even short) description of standard PowerShell cmdlets.