The author mainly draws on the book Effortless Mastery by performer and composer Kenny Werner, as well as guided meditations from the app Headspace.
Höfundur styðst fyrst og fremst við bókina Effortless Mastery, eftir bandaríska tónlistarmanninn og tónskáldið Kenny Werner, og leiddar hugleiðsluæfingar úr forritinu Headspace.