The Jing Kung E-Book App aims to provide plentiful e-learning resources by including numerous textbooks in database. Tailor made version for teacher includes teaching notes, interactive in-class exercise with answers and immediate result feedback from class. Student version also ensure efficient learning by providing bookmark, jot notes function and previous year’s textbooks could be viewed anytime. We sincerely hope the App could help save the planet and to reduce the weight of textbooks carrying.