I don't believe there is a 2017 version -- there is the old First Edition and the newer second edition. It is available on amazon for a reasonable price -- to my knowledge there is no legal pdf download.
You can use the OTO Navi app.
iOS: https://apps.apple.com/us/app/oto-navi-sound-navigator/id1490391845
Android: https://play.google.com/store/apps/details?id=jp.co.japantimes.jtpaudioplayer&hl=en_US&gl=US
I believe there are digital copies being sold, such as for the kindle. Though in regards to anywhere else, I'm not too sure.
Hope this helps!
Hope this helps!
Not yet, but it's up on Amazon for ordering.
It took me some time to find as well, but the 3rd ed. workbook is on US Amazon: https://www.amazon.com/gp/product/4789017311/ref=ppx_yo_dt_b_asin_title_o00?ie=UTF8&psc=1