An e-book allowing note and corrigendum sharing as well as differential update is produced using vector graphics satisfying XML syntax, and a script program is embedded in or linked to the e-book. The script program allows a user to add various kinds of note markups to the e-book, including fluorescent marker, text annotation, handwriting note, bookmark, digital blackboard record, post-it note, highlight, voice, memo, tracking information, etc. The e-book also allows an e-book editor to correct any error in the e-book. The note markups and corrigenda may be uploaded via network, and be shared among other users by way of differential update.