If you are like me and don’t normally read all the MSDN Headlines when starting Visual Studio then you will probably have missed the blog posting from the Powershell website for a free ebook on PowerShell V1. From looking at the contents and at 567 pages long it should be a pretty in-depth guide.
This can be ebook number 3 to read, after IronPython in Action and ASP.Net MVC in Action from Manning.