I'm thinking of buying 'Making Spatial Decisions using GIS and Lidar' by Keranen and Kolvoord from Amazon. I'm mainly buying it for the 180 day free trial but I'm not 100% sure I'll be able to access it. This is because I've used a 60 day trial and purchased a home use licence on my current computer in the past. Will I still be able to use the free trial that accompanies the above book on the same computer? Also, I'm assuming the free trial will be valid if you buy it from Amazon and not direct from Esri Press, am I correct?