Now that SAPIEN Press is on the verge of releasing Windows PowerShell 2.0: TFM (http://www.sapienpress.com/powershell3.asp), they are making the first edition version of the book available as a free e-book. While you won't learn about new features like remoting, there's still plenty of useful information and you can't beat the price. You can download the file at http://www.primaltools.com/downloads/communitytools/.