"The Book of Disquiet" is a posthumously published collection of thoughts and musings of a solitary dreamer, who is a Lisbon-based bookkeeper. The book delves into the mind of a man who is discontented with his mundane life and finds solace in dreaming and writing. The narrative is a profound reflection on life, solitude, and the nature of humanity, filled with philosophical insights and poetic language. The protagonist's introspective journey and his struggles with existential despair make it a seminal work in the genre of literary modernism.

"The Duino Elegies" is a collection of ten elegies that delve into the complexities of human existence, exploring themes of love, death, time, God, and the nature of reality. The author uses vivid and often unsettling imagery to convey a sense of the profound beauty and pain inherent in the human experience. The elegies are named after the castle of Duino, where the author began writing them, and they are renowned for their introspective depth and philosophical insight.

The book is a seminal work in the history of prose poetry, capturing the modern urban experience through a series of short, lyrical pieces. It delves into the psychological landscape of the city, exploring themes of melancholy, ennui, and the search for beauty amidst the squalor of Parisian life in the mid-19th century. The author's sharp observations and vivid imagery reflect his complex relationship with the city, oscillating between a deep love for its vibrant culture and a profound sense of alienation. This collection of prose poems is considered a touchstone for modernist literature, influencing generations of writers and poets with its innovative style and introspective depth.

This collection brings together the rich and varied poetic works of one of Portugal's most celebrated literary figures, a writer known for his multiple writing personas, or 'heteronyms.' The book showcases a selection of poems that delve into themes of existentialism, identity, and the nature of reality, reflecting the author's deep introspection and his fascination with the self and its multiplicities. The poems range from sonnets to free verse, each offering a window into the author's complex inner world and his philosophical musings, all while capturing the unique spirit of early 20th-century Portuguese culture.

"The Keeper of Sheep" is a philosophical and introspective collection of poetry that delves into themes of existence, consciousness, and the nature of reality through the eyes of a shepherd. The shepherd, a persona of the author, reflects on the simplicity and complexity of life while tending to his flock, offering a unique perspective on the mundane and the profound. The poems are characterized by their contemplative tone and a sense of detachment from the material world, inviting readers to question their own perceptions and the essence of being. Through this pastoral figure, the work explores the interplay between the external world and internal thought, ultimately seeking a deeper understanding of the self and the universe.