Occasionally PCWorld includes this in a software sale and I bought my copy (some little while ago) from them at about £42
The price you quote is about as good as you will find as it is regularly advertised at much higher prices as I'm sure you know
What is ransomware and how do I protect my PC from WannaCry?
What I learned from my mentor, Oscar-winning VFX supervisor Phil Tippett
Siri vs Google Assistant
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