Ruby/Rails training book suggestions

This list was first collected in February 2014, so it could probably stand some updating. My original list says to consider the following books:

I also have a note to myself to ignore the O’Reilly Ruby books. I don’t know why I wrote that note any more.

I also don’t know why the Agile book ( Agile Web Development with Rails 4) is not considered.

I also heard about this website ( http://learnrubythehardway.org/book/intro.html ) which may be added to an updated list.

It’s probably time to update the list.