I've bought one prima e-guide. It was for Caesar IV. Figuring that I would simply take the e-guide and print it out on my nice printer and then have it bound with my binder machine. Unfortunately, it wouldn't even allow me to print it out. I contacted Prima who after several days responded that they know there is an issue with trying to print out the Caesar IV e-guide. I was like, WTF? So you tell me there is a known issue with printing the guide and that's all that you tell me? So I contacted them again, this time not being so unicorn and puppy dogs polite and asked them then what was I to do about printing out the guide, after all that was my primary purpose in buying the guide so that I could save money and print it out myself (printer, supplies binding machine was all freebies from where I use to work, they let me take all the supplies when they went out of business).
Well, long story short, I did get a positive resolution out of it. They ended up mailing me the full paper Caesar IV prima guide. But some e-guides don't have a paper counterpart, so for those guides if you can't print them out, your just out of luck. From what I understood of the situation after they told me they were sending me the physical guide, they also told me that it has to do with how large that guide was (over 200+ pages I think), and that was causing the issue of not being able to print it out.
Anyway, I looked at this EIC e-guide and quite frankly, if the content in the free pages that we can see is indicative of the contents of the full guide, then to me it's is nothing more than a waste of my money. The stuff that I read in the e-guide preview, I would expect to be in the manual for the game, not in a strategy guide simply there to take up pages and make it look more heft than it might actually be. I assume that either the developers or the publishers get a cut of the profits of the sales of the e-guides and is why they don't bother putting out proper manuals anymore, but instead opt to nickle and dime us some more by selling us the manual disguised as a strategy guide.