Wraiths are a fictional sapient species featured in the novel The Apprentice Librarian.
Wraiths are described as “a type of night spirits”. They are tall, skeletal, and wear hooded dark robes that leave their features impossible to make out. They have little physical strength but are capable of phasing through wood, though stone is enough to block them. Because of this, they are often employed as robbers or assassins.
Wraiths cannot move about during daytime, as the Sun (as any strong light) is able to burn them. They are thus also weak to fire. Like most lesser spirits, they can also be bound to a place by a circle traced by a human in the dirt, which they are unable to erase.