"Poltergeist" is the second book in the Greywalker series, about Harper Blaine, a Seattle PI who's near-death experience has left her with the ability to see and enter The Grey, a parallel space where ghosts and broken memories of the dead abide.
"Poltergeist" has a very original premise: a psychology experiment that involves the creation of an man-made poltergeist through the collective belief of a group of subjects.
Ths builds on the "Philip Experiment", carried out in Toronto in 1972, to create a fictional character that would nevertheless manifest in a séance.
Kat Richardson take this idea and builds it into a compelling murder investigation involving an over-bearing professor, a group of edgy individuals who all believe they have created a ghost and a poltergeist that is being used as a weapon by somebody.
Kat Richardson does a wornderful job of providing a strong logical explanation for all the action while deepening Harper's understanding of The Grey and her own unlooked for abilities.
The tale is told in a straightforward, whodunnit, linear fashion that grounds the story and grants it a kind of realism.
This is strong offering for the second book in a series. I'm looking forward to reading the rest..
If you're interested in learning more about the Philip experiment, take a look at the video below.