Ryan Holiday
https://ryanholiday.net/)
Ryan Holiday - Stillness is The Key
https://www.amazon.com/Stillness-Key-Ryan-Holiday/dp/0525538585)
Ryan Holiday - Growth Hacker Marketing
https://www.amazon.com/Growth-Hacker-Marketing-Primer-Advertising/dp/1591847389/ref=sr_1_3?keywords=growth+hacker+marketing&qid=1575982419&s=books&sr=1-3)
