I’m doing research on the ideals and intent behind crypto, and I’m trying to find info on Ethereum. Can someone point me towards the right direction?

Okay. The specific question is, "What are the ideals and intent behind cryptocurrency?", and right now I'm trying to find information on one of the main currencies I'll be focusing on which is, of course, Bitcoin and Ethereum. I need more info on Ethereum because except for one book I found, there is not much. Could someone please point me to the right place?