The Tenth continues the mystery of the Through-Room Trilogy as Henry Adler and Mara Lewis uncover a deeper secret hidden within the ancient network of doors between worlds. After strange changes begin appearing in the basement beneath Henry’s house, they learn of a hidden “tenth position” — a passage not meant for travelers, but for the mysterious Keepers who silently watch over the network itself. As whispers of an ancient apparatus, secret archivists, and forgotten builders emerge, Henry and Mara are drawn into a hidden order that has existed for thousands of years. Blending fantasy, mystery, and quiet suspense, The Tenth explores trust, responsibility, and the unseen forces that shape the worlds beyond the door.