Darren "Dags" McConnell's life is far from normal—not everyone sees and talks to ghosts—but none of his life experiences prepare him for what's to come. After he receives a set of magical summoning marks on his palms as part of an initiation into a Ceremonial Magic group, Dags becomes the target of the group's leader, whose nefarious plans to bring his wife's spirit back from the Abysmal plane would also bring about Dags' death. A bungled spell and Dags' tattoos become gateways of the Abysmal and Ethereal planes, and host to a pair of Familiars who bring with them knowledge of a powerful grimoire. A book, in a witch's hand, that will irrevocably change him forever.

Beyond The Door is a bridge piece between Revenant and Geist. Zoë is trapped in the Abysmal Plane and Dags is little more than a doll with the pages of the Grimoire inside of him scrambled, many of them missing. Zoë and Dags' friends believes the Grimoire is the key to helping Zoë, but first they have to find the missing pages and put them back, in order. But Zoë's mother, Nona, has decided that Dags' body is better kept at the Society house under heavy guard, convince by her ex-husband, Zoë's father and Ethereal Virtue, that Dags' half-life would be better used as the key to taking control of the Abysmal Plane.

When his best friend's daughter vanishes without a trace, Guardian Dags McConnell pledges to find her by using the power of the magical tome fused to his soul. Known only as the Grimoire, this book contains centuries of magic, spells and curses eager to be used. Can Dags keep that power under control when he finds himself pursued by a flesh-rending Changeling, a megalomaniacal Angel, and a mad Faerie Queen? From the National Bestselling Author of Revenant comes a new novel set in the world of the Zoë Martinique Investigations.

“I have an ancient Grimoire fused to my soul and my mother’s a Faerie…what does that make me?” I asked my closest friend. Mike answered me with a smirk. “Screwed.” After learning his mother is very much alive, a Daoine Sidhe, no less, Dags McConnell settles into life in Savannah, GA with his best friend, Mike Ross. In no time he and Mike find themselves under siege by zombies intent on dragging Dags away. Then Dags finds his father’s body in a hotel room, and the local law puts Dags firmly in their sites. The two friends find themselves tormented by a young Faerie Queen, a Djinn, and a powerful vampire, set on taking down the Grimoire’s keeper, and making the half-faerie his to control.