A pre-experimental case study design was used to explore the value of intrinsic motivation in mobile eBook reading among 30 Grade 1 child participants. Data collection comprised pre- and post-test motivation questionnaires and researcher field notes. Child participants' enjoyment of mobile eBooks corresponded to 3 motivational aspects of intrinsic motivation: curiosity, choice, and challenge. Post-test results indicated that most child participants enjoyed answering eBook comprehension questions and preferred eBooks to print books. Child participants' reading behaviors related to iPads' accessibility features and inherent reader-friendliness. The motivating features of using mobile devices for eBook reading and enhancing reader motivation are described.