This pattern is not available as a single pattern. It is a book of 13 patterns by SKNITSB For more information:
https://www.etsy.com/shop/SusanBarsteinKnits
https://www.sknitsb.com/books.html

I love the look and feel of this pattern. I have used it before in mystery knit alongs and blankets but never alone. It’s a beautiful pattern that feels fluffy and similar to a brioche knit, but it’s not. It’s fun, yet a bit tricky, so pay attention and remember to SLIDE!