This research investigated the effects of an educational electronic book (e-book) on low socioeconomic status (SES) kindergarteners' emergent literacy while focusing on the relationship between process and outcomes during joint learning. The sample (96 kindergarteners, aged five to six) was randomly assigned to experimental (e-book activation) and control groups (regular kindergarten program). The experimental group's second joint learning session was recorded. Emergent literacy measures included word meaning, phonological awareness, and story comprehension. The main findings indicate an association between the process of e-book use (hotspot activation and collaboration) and educational outcomes (emergent literacy). Implications for educators and e-book designers are noted. (Contains 4 figures and 4 tables.)