I know Mr. Cave wrote this toward the end of his career, and he was mainly known outside of the horror genre, but The Evil is probably not the best introduction to his work. While well written and paced, and had voodoo has a major theme, this just was not scary, gory, or even very suspenseful. The only thing that kept me reading it was the depiction of Haiti, especially rural Haiti where most of the 'action' took place.
Our main protagonist, Sam, worked in Haiti for a few years helping farmers make the most with what they have; he is a doctor of horticulture at I presume the University of Vermont. On his tour there, he fell in love with an American nurse at a rural hospital, but she stayed on and he went back to the states. A few years later, he returns. Why? It turns out a fellow professor at Vermont 'had a thing' for ESP, etc., and wanted to research voodoo; after picking Sam's brain, away he went. Unfortunately, he seems to have disappeared and now his lovely daughter heads to Haiti to find him and Sam agrees to help...
Interesting set up, and Cave plays with a few story lines here, the nurse's tale in Haiti and Sam and company's quest to find her dad, and of course, some powerful voodoo priest also haunts the pages. Unlike most voodoo themed tales, Cave never even attempted to depict the nitty-gritty of voodoo and such, but made do with some oblique references to the 'gods' and ceremonies. Again, if it were not for the lovingly depicted rural Haiti, I probably would have put this down. Make no mistake-- The Evil reads nicely, but the love story between Sam and the nurse was a bit painful in its predictability as was the plot in general. If you are really into voodoo and Haiti, this might be worth a read; else, worth a pass. 2.5 stars, rounding up.