I am sure it has been asked before, but I recently hired a helper and he has noticed my truck preps (first aid kit, truck pouch, etc) and asked me about it and we have gotten to talking, he is interested in getting started but hasn't had the finances to actually go through with it. Are there any online sites where he can download books to read? He does live out in the country so he is excited about starting to learn knots and try some stuff in his backyard.