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Physics electronic school books (BSEF) that are currently used in the schools are static and have not optimized its digital format. The purpose of this research is to produce a dynamic and interactive BSEF design that can be used for self-study, designed with scientific approach, and can foster students' critical thinking skill. The method used in this study is research and development which is until to design validation test. The sample for requirement test consisted of 130 high school students and 4 physics teachers drawn randomly from 3 different Senior High Schools in Lampung Province. The data of BSEF needs are collected using questionnaires and analyzed using quantitative descriptive.The expertise design test is carried out by experts in the field of physicseducation. The expertise instrument test in the form of interactive BSEF design assessment sheet. Based on research data, it is known that students and teachers want an interactive BSE that can be used independently, prepared with scientific approach, can enhance the critical thinking skills and contains the interactive exercises equipped with feedback. The results of the expertise test show that interactive BSE that start the showing a physics phenomenon which increases curiosity, is based on scientific approach stages, and contains experimental simulations and exercises which are supported with feedback.