"Diamond Lens with Other Stories" by Fitz-James O'Brien showcases the brilliance of an underrated master of weird fiction, bridging the gap between Edgar Allan Poe and later luminaries like Algernon Blackwood and Ambrose Bierce. This collection features some of O'Brien's most celebrated tales, including "The Diamond Lens," which intertwines themes of science and the supernatural, and "What Was It?", introducing an invisible menace that predates modern interpretations of invisibility. With bizarre narratives such as killer puppets in "The Wondersmith" and a haunting mystery in "A Pot of Tulips," O'Brien's work continues to resonate with readers today, illustrating the timeless allure of imagination and the uncanny.