The Hummingbirds was given an insightful review in Commonweal by a writer I admire, Nick Ripatrazone. Here's a quote I pulled, followed by the link to the full review.
"McMeekin builds a world where secrets, desires, and an obsession with appearance are all that matter. His writing has a cinematic quality: lush descriptions of mist lifting off the pool in the dark of night, or grotesque accounts of the cult’s devotions and abuses...In Hollywood everything is given a sheen of perfection, and its devotees are committed to maintaining the charade. And as the novel reaches its conclusion, Ezra discovers what people are willing to do to preserve their delusions."