A monograph titled "Information security. Threats, Challenges, Opportunities, and Risks" under the scientific editorship by Dr. Maryla Fałdowska, has been published by the Scientific Publishing House of Siedlce University. The volume includes a chapter titled "Cyberspace as a (un)limited and (a)territorial dimension of information security" authored by Mariusz Matacz, MA – a doctoral student at the Doctoral School of the University of Siedlce in the discipline of security studies.