All-New Echo Dot (2nd Generation) Beginner's User Manual: This Guide Gives You Just What You Need To Operate An Echo Dot (2nd Generation) Like A Pro! - Kindle edition by Ibrahim, Pharm.
I like this from Best Buy | Amazon alexa echo dot, Amazon echo, Echo dot
Echo Dot Setup 2nd Generation 2017 - YouTube
How to set up a second Amazon Echo in your smart home - Gearbrain