About The Prevalence of Mystery, Rennie McQuilkin's late-life poetry collection, the author writes this: "I present these poems as a sort of postscript remembering the long year following the departure of my dear wife, Sarah. I trust they reflect my enduring love for her, faith in the value of holding fast, admiration of the natural world, and profound respect for those who have shown me the way. Behind it all is the prevalence of mystery.