"In a Glass Darkly" is a collection of five short stories in the horror and mystery genres, all presented as cases of a fictional physician whose researches lead him into the dark corners of the supernatural. The tales involve a range of eerie and macabre happenings such as a man being haunted by his doppelgänger, a cursed mirror, a deadly spectral wolf, a case of spontaneous combustion, and the iconic story of a woman being preyed upon by a female vampire. The stories are tied together by the posthumous papers of the occult detective Dr. Martin Hesselius.

This collection features a series of chilling and atmospheric tales that delve into the supernatural and the macabre. Each story is crafted with a masterful blend of suspense and psychological depth, exploring themes of fear, the unknown, and the eerie presence of the otherworldly. The narratives often revolve around haunted locations, mysterious apparitions, and the unsettling experiences of individuals who encounter the inexplicable. Through rich, descriptive prose and intricate plots, the stories evoke a sense of dread and curiosity, inviting readers to explore the darker corners of the human psyche and the spectral world.

This Gothic novella tells the haunting tale of a young woman's susceptibility to the charms of a mysterious female vampire named Carmilla. Set in a castle in Styria, the story unfolds as the protagonist becomes increasingly entranced by her enigmatic guest, whose true nature is gradually revealed through a series of eerie incidents. As the bond between the two deepens, a pattern of strange illnesses and deaths emerges, leading to the chilling discovery of Carmilla's vampiric identity and a desperate struggle to save the protagonist from a similar fate. The novella is a seminal work in vampire fiction, predating the more famous Dracula, and explores themes of sexuality, predation, and the supernatural.

The novel is a darkly comedic tale set in medieval Ireland, following the misadventures of a timid and hapless monk named Fursey. When Fursey inadvertently becomes the target of demonic forces, his life is turned upside down as he struggles to navigate a world filled with supernatural chaos and ecclesiastical bureaucracy. Despite his best efforts to maintain a pious and uneventful existence, Fursey finds himself embroiled in a series of absurd and often dangerous situations, highlighting the clash between the mundane and the mystical. The story cleverly satirizes religious institutions and human folly, blending humor with elements of the fantastical.

Set in Texas in the early 19th century, this novel follows the mysterious and eerie adventures surrounding the legend of a spectral rider who haunts the prairies. The story weaves together the lives of settlers, Native Americans, and the enigmatic figure of the Headless Horseman against a backdrop of love, jealousy, and frontier hardship. As the protagonist, a young Irish adventurer, pursues the affection of a beautiful plantation owner's daughter, he must also unravel the truth behind the chilling myth that seems to be connected with a series of unsettling events, leading to a climax that intertwines romance, suspense, and the supernatural.

This novel introduces readers to a world where ancient magic and modern day collide, centered around the life of Nicholas Flamel, a legendary alchemist who possesses the secret to eternal life. When his powerful book, the Codex, is stolen, Flamel and his wife must rely on the help of two teenage siblings, Sophie and Josh Newman, to recover it. The story unfolds across a backdrop of myth and history, weaving together a thrilling adventure that spans across continents and involves figures from lore and legend. As the twins discover their own untapped powers, they become central to the battle between the forces of good and evil, with the fate of the world hanging in the balance.

"The Weir" is a play set in a rural Irish pub, where the local men are joined by a woman from Dublin. Over the course of an evening, they share stories filled with personal reminiscences and Irish folklore, each tale more revealing and unsettling than the last. The intimate setting and the characters' narratives weave together themes of loneliness, loss, and the search for connection, as the supernatural elements of their stories reflect the haunting undercurrents of their own lives. The play's rich dialogue and atmospheric tension create a poignant exploration of the human condition and the power of storytelling to bring people together.

"Mythologies" is a collection of essays and stories that delve into the rich tapestry of Irish folklore, mythology, and the occult. The work explores the intersection of the author's fascination with the supernatural and the cultural heritage of Ireland, examining themes of national identity, the power of myth, and the spiritual dimensions of the human experience. Through a blend of scholarly analysis and imaginative narrative, the book seeks to uncover the deeper meanings behind Irish legends and the enduring influence of these ancient tales on contemporary thought and literature. The author's lyrical prose and insightful commentary offer readers a window into the mystical world of Celtic tradition and its enduring legacy.

"At the Hawk's Well" is a play that blends elements of Japanese Noh theatre with Irish folklore, focusing on the story of an old man who has spent his life waiting by a magical well that is guarded by a hawk-like creature. This well is said to grant immortality when its waters are stirred. The narrative unfolds as a young warrior arrives, seeking the same immortal waters. The play explores themes of obsession, the pursuit of unattainable goals, and the intersection of fate and free will, all conveyed through a combination of dance, masks, and poetic dialogue.