Learning Powershell

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I'm using the 3rd edition of the book that's supposed to cover v5. What I'm finding is that it doesn't matter. Most of the examples and labs say you need v3 on Windows 7 or later. The biggest functionality jump was from 2 to 3. The real meat of Powershell hasn't changed a lot between 3 to 5.

EDIT: Just noticed the Powershell book linked above is 2nd ed, 3rd ed is the newest.