best self discipline books

I have read so many self discipline books but in my eyes the best self discipline book has got to be 

Mindful Self-Discipline: Living with Purpose and Achieving Your Goals in a World of Distractions by  Giovanni Dienstmann

Please click on the Amazon uk  link below to read the reviews and purchase (I may get a commission if you purchase through this link)

https://amzn.to/3orONuL

Happy self discipline xxx