ABSTRACT Reading storybooks aloud to prereaders helps them develop oral language skills; but educators struggle to select appropriate storybooks for read alouds. To better understand this selection process, we evaluated how experienced speech language pathologists (SLPs) apply the storybook selection rubric in Schwarz et al.'s (2015). A read-aloud storybook selection system for prereaders at the preschool language level: A pilot study. Journal of Speech, Language, and Hearing Research, 58(4), 1273-1291. doi:10.1044/2015_JSLHR-L-15-0056. That rubric includes: eight book characteristics, one four-level difficulty scale, and exemplar storybooks for each scale level. Using this rubric, 38 SLPs—who had served children at the preschool language level—rated 63 storybooks based on how difficult they thought the storybooks would be for children at the preschool language level to understand when the storybooks were read aloud to them. A principal component analysis identified-among the original eight characteristics a subset of five highly correlated characteristics related to overall text difficulty: vocabulary, story structure, sentence length, book length, and density. We revised the original rubric to include only four storybook characteristics: (a) text difficulty, (b) amount of inferencing, problem-solving, and abstract concepts, (c) familiarity of activities/experiences, and (d) level of support provided by the illustrations. Using quartile values of the text difficulty characteristic, we derived a four-level difficulty scale for the 63 storybooks. The revised storybook selection rubric simplifies the process of selecting appropriate storybooks for read alouds. The revised rubric and SLPs' difficulty ratings of 63 storybooks provide clinicians with a resource ready-made for clinical practice.