An inspiring anthem to the power, promise and challenges of courage - the first in a series examining the timeless stoic virtues. #CourageIsCalling, the latest New York Times Bestseller from Stoic Sensation @ryanholiday, is now available in paperback! #ryanholiday #courage #stoic #stoicism #thedailystoic #nonfiction #nonfictionbooks #nonfictionreads #philosophy