We found 2 Reddit comments about Putting Out of Your Mind. Here are the top ones, ranked by their Reddit score.
This book really helped to improve my ball golf putting. There's a lot of carryover between the two sports. Such as with me, being really streaky as well as missing putts that I shouldn't miss because I tell myself I shouldn't miss right before I putt.
I am the reverse of you, a 9 index with my putting just this season coming around nicely. It all started with this book, I've found it to be mostly mental. https://www.amazon.com/Putting-Out-Your-Mind-Rotella/dp/1416501991
Wish I had an extra copy because I would send it to you.
I also am going to get fit for Mizunos, leaning toward the MP5 :) Best of luck!