The Scholar, the sphinx and the threads of fate / A. R. Cook.
(Book)

1854, France. David Sandoval wakes up on the outskirts of Le Havre, with no memory of what he has been through and who he has left behind- not of Fenrir the world-devouring wolf, not Baba Yaga the witch, Tanuki the shape-shifter, not even Acacia the Sphinx, who has held a place in his heart for years. It is not only his memory that is gone, for his existence has been erased by Lord Nyx, the incarnation of the Night, and no one in the human world can see or hear him. Yet something still ties David to the magical world, keeping alive a glimmer of hope that he can be restored. With the help of the storyteller Anansi and Baba's cat Vasilisa, David traverses the places and people of his past, gradually regaining his memory and his existence. But old enemies start to pick up on his trail, including Madness itself and Nico the Teumessian, who blames David for his "undead" state of being. To complete his restoration, David must face the Moirai, the weavers of the magical Curtain that not only separates the worlds of humans and of mythical creatures, but also holds everyone's destinies. Can David have a new fate woven for him, and will the price be higher than he is willing to pay? Meanwhile, Acacia finds herself in league with the Asgardian warrior Tyr and the vengeful Fenrir to defeat Lord Nyx once and for all, and an old friend of hers, Alasdair Gullin, is coming with a league of Master Huntsmen to side with her in the final battle. What Gullin will have to sacrifice to do so, however, may spell his doom, and may not be enough to take down the night god and save all worlds from falling under Lord Nyx's shadow.