"The Hate U Give is a 2017 young adult novel by Angie Thomas. It is Thomas's debut novel, expanded from a short story she wrote in college in reaction to the police shooting of Oscar Grant." ~google
He used TEMPERA on panel.
Answer:
All mandalas represent an invitation to enter the Buddha's awakened mind. Tibetan Buddhists believe that in each person's mind there is a seed of enlightenment that can be discovered by contemplating a mandala. The mandala's design denotes the order and harmony of an enlightened mind.