A teenage math prodigy is contacted by otherworldly beings through his nightmares. As the separation between dream and reality seems to disappear, he faces a supernatural threat with the help of a religious girl from his high school.
There really is quite a lot of mathematics in this horror/thriller. Sprinkled throughout the novel are brief but often informative references to number theory, to Georg Cantor's theory of transfinite cardinals and the Continuum Hypothesis, to Conway's surreal numbers, and to the notation used by mathematicians (such as the upsidedown "A" that stands for the logical expression "for all"), among other things.
However, the connection between these interesting ideas and the unconvincing numerology, ancient mysticism, frightening demonology and obscure religious references (such as the socalled "2520 Prophesy") that are the focus of this novel was never clear to me. Perhaps some other readers will find this either entertaining or enlightening. Personally, I felt as if I was being subjected to the nonsensical ramblings of someone suffering from schizophrenia:
(quoted from Nightscape: The Dreams of Devils)
It's Hilbert's infinite hotel again, this time on a grander scale, with the Absolute as the greater infinity (the greatest, in fact) and the Earth, well, my Earth  whatever I can create  the lesser. Just as an infinite number of fractions exist between counting numbers, an infinite number of worlds can exist within the living universe of the Absolute. Is this what steady recitation of the Jesus Prayer revealed to the monks of St. Athos? That we exist as part of a subset of infinity and can create other comparable subsets if given the name of God? Exactly good. Numbers and prayer together  how close to my habitual counting trick.

According to the cover, this novel was "inspired" by the author's film, "Nightscape". And, the introduction lists the nonfictional sources he consulted for information about mathematics.
