I wasn’t trying to imply any malicious intent. 
I know of at least one person who recently bought the book and didn’t know that they would have to downgrade Phoenix in order to be able to follow the instructions. That’s certainly not an elegant footgun for newcomers to stumble into, so I’m happy to nudge things in the right direction.
The book has served its purpose, and while I think it would be nice to have “The Phoenix Book”, the docs are an excellent up-to-date resource, and have an unbeatable price.
