Joe R. Lansdale & Kasey Lansdale 
Case of the Bleeding Wall [PDF ebook] 

" On a moonlit night with the sky in flight, the spirit of the dark one comes through." With the " terrible event" explained Dana suspects her ex-lover has been dabbling in dark magic but before she can confront him, she and Jana arm themselves with occult knowledge, potions, espresso, and a… water gun, of course. In this penultimate issue, under a full moon, things get darker still.