"The Greenness of Springtime" contains the complete works of Alberto Caeiro, the "Naive Master" created by Fernando Pessoa (1888–1935), one of the greatest poets in the Portuguese-language literature. Unique among world writers, Pessoa forged tens of heteronyms throughout his life, and Caeiro, who embodies a simple shepherd with hardly any formal education, ranks among the most important of them. Through contact with his flocks and Nature itself, Caeiro takes us on an incredible journey of wonder as we savor every line of his poetry. He lives in harmony with Nature, but at times this natural balance appears to be upset by an external force, inviting us to look inward as well as outward, Caeiro's poetry is an invitation to look at the world and "see" it "without thinking". Completely averse to metaphysics, he suggests that thoughts blur our vision, and "thinking is being sick from the eyes". For him, "To think a flower is to see it and smell it. / And to eat a fruit is to taste its meaning". His ability to tap on all five senses gave him the nickname "sensationist poet". Even though he lived over 100 years ago and died at a young age, he seems to be deeply aware of the threats posed by industrialization and the need for a more holistic environment. In a sense, Caeiro was a visionary who was far ahead of his time. Tapping on his respectable experience as a literary translator, Oliver Simões delivers a book that is poetic and beautiful from beginning to end. "The Greenness of Springtime" contains an introduction with more information on the use of the heteronyms. In Pessoa's own words, his is a "whole literature", placing him along with Camões, Whitman, and Shakespeare in the pantheon of world-renowned poets. Pessoa also wrote prose, and mostly in Portuguese, but also in English, in which he was fully fluent. Each poem in translation is presented side by side with the original in Portuguese.