This paper describes an ongoing research project in the area of electronic books. After a brief overview of the state of the art in this field. two new forms of electronic book are presented: hyper-books and visual-books. A flexible environment allows them to be produced in a semi-automatic way starting from different sources: electronic texts (as input for hyper-books) and paper book... https://www.pomyslnaszycie.com/rivet-sweat-charcoal-on-sale/