"Melmoth the Wanderer" is a gothic novel that tells the story of John Melmoth, a man who sells his soul to the devil for 150 extra years of life, and spends that time wandering the earth in search of someone who will take over the pact for him. The narrative is a complex series of nested stories, told by many different characters, and it explores themes of guilt, redemption, and the inherent evil of mankind.

In the final installment of this popular series, the protagonist and his friends decide to leave their school to complete the mission left to them by their late headmaster - to destroy the remaining pieces of the antagonist's soul, hidden in various objects. As they journey through the wizarding world, they uncover the truth about the antagonist's past and the legend of the Deathly Hallows. Amidst the escalating war, they are captured and narrowly escape, leading to the ultimate battle at their school where many lives are lost. The protagonist learns he must sacrifice himself to truly defeat the antagonist, but is given a second chance at life and finally triumphs, ending the war. The story concludes with a glimpse into the peaceful future they have all earned.

"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 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.