The Greenhouse, by Audur Ava Olafsdottir, is instantly appealing, so it’s no surprise that Amazon Crossing chose to release Brian FitzGibbon’s translation. Its shy, modest protagonist has spent the years or so since his mother’s death caring for his aging father, his autistic twin brother, and his mother’s greenhouse, where he has cultivated a rare eight-petaled rose. Now he is leaving to take a job restoring the rose garden of a medieval abbey in an unnamed European country.