I enjoyed this small horror collection a whole lot, since it's brimming with creepiness, nastiness, and passion for the weird! It's just five stories, written very competently, a couple of them quite original in fact (which in this day and age is an achievement in itself!).
The author brings his own experiences as a counselor, and, to be honest, for me that also brought a refreshing perspective on weird fiction and its workings, since the horror and the weirdness grow organically out of seemingly innocuous daily experiences; I think this is the best way to make the story feel realistic and the writing compelling.
My favorites were the opening story, "The Signal," about a jaded counselor who shows ingenuity in dealing with a problematic client - the story's creepiness can't be understated and the whole theme of "the creepy patient" is handled marvelously; "School Play," a cosmic horror tale with strong Lovecraftian overtones, its narrator a collector of old VHS tapes, who discovers the recording of a play about Carcosa (IYKYK); and the titular "Wrong Number," another tale inspired by the author's counselor days, this time about a client who gets mysterious calls for years; she's recorded them, and the counselor decides to listen to one - big mistake!
Overall, this is a very entertaining weird fiction collection, and I for one am looking forward to the possibility of another similar work by the author.