Yes, H.P. Lovecraft’s books are indeed connected. Many of his stories share a common universe, often referred to as the Cthulhu Mythos. In this interconnected mythos, Lovecraft created a pantheon of cosmic entities, settings, and themes that recur across different works. For example, characters like Cthulhu, Nyarlathotep, and Yog-Sothoth appear in multiple stories, creating a sense of continuity and depth in his fictional world.
Furthermore, Lovecraft often referenced other fictional works and even encouraged fellow writers to expand on his ideas, contributing to a collaborative mythos that has persisted beyond his lifetime. This interconnectedness allows readers to enjoy a richer experience as they discover links between different stories, enhancing the eerie and cosmic horror atmosphere that Lovecraft is well-known for.