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Zigi MedrudZigi Medrud 

I want to learn all of salesforce, but I do not have permission to use my company's org. can I just go through the trailhead and learn everything on a fake org? I have the free developer site. I think

I want to learn all of Salesforce, including visual force and apex classes and everything AI, but I do not have permission to use my company's org to do this. I signed up for the developer edition that was offered to me for free over a year ago and learned a lot. but there were things that I was unable to do, try, learn. so, Is there a fake org that I can use to learn everything? 
Amit Chaudhary 8Amit Chaudhary 8
You can create the free developer org to learn salesforce
1) https://developer.salesforce.com/signup?d=70130000000td6N

In Developer org you can do any thing. and yes trailhead is one of the best way to learn about salesforce

Please check below post for book related link
1) http://amitsalesforce.blogspot.com/search/label/Book

Let us know if you need more help