Novels:
* The Tale of the Chieftain (1903) - A historical romance set in medieval Scotland
* The Young Architects (1908) - A coming-of-age story set in the 1870s
* The Waters of the Moon (1913) - A semi-autobiographical novel about a young boy's experiences in a village in Ireland
* A Spiritual Adventurer (1915) - A psychological novel about a man who tries to escape from the limitations of his own personality
* Follow the Arrow (1918) - A novel set in the early 20th century, exploring themes of love, loss, and disillusionment
* The Spring Song (1920) - A novel about a young woman's search for happiness
* The Strange Enchantment (1925) - A novel about a man who is haunted by the past
* In Shadow of the Hill (1930) - A novel set in the 1920s, exploring themes of identity and self-discovery
* The River and the Source (1932) - A semi-autobiographical novel about a young boy's experiences in India
* The Life of the Salmon (1934) - A novel about a group of people living in a small town in Scotland
* The Green Cypress (1935) - A novel about a young man's search for his identity
* The Man in the Tree (1942) - A novel about a man who becomes obsessed with a tree
* The Hidden Valley (1945) - A novel about a group of people living in a remote valley in Scotland
Short Story Collections:
* A Touch of Earth (1923)
* The Return of the Warrior (1928)
* The Strange One (1936)
* The Green Cypress (1935) - A novel about a young man's search for his identity
* The Man in the Tree (1942) - A novel about a man who becomes obsessed with a tree
* The Hidden Valley (1945) - A novel about a group of people living in a remote valley in Scotland
Reid was known for his lyrical prose, his sensitivity to the natural world, and his exploration of the psychological depths of his characters. His works are often seen as a bridge between the Victorian and Modernist eras in English literature.