Despite the misleading cover art The Red Tree
is a very intelligent and skillfully done horror tale that's low on gory trappings and has much of the subtlety and atmosphere of dread that's always driven the best gothic fiction. Plenty scary, too, with a few details (the old canning jars of pickles, for one) unnervingly evoking my own recent "basement" experience.
Early in the book there's mention of groundwater slowly seeping in to fill an abandoned quarry. That's a pretty fair description of how the horror in this novel operates.