The Monograph issue on “Modern Trends in Strings, Cosmology and Particles” has been published in the series of the Publications of Astronomical Observatory of Belgrade no. 88.
We would like to thank all the authors for their contributions, as well as the referees for making possible the publication of this issue. Especially thanks are due to Ministry of Science and Technological Development of the Republic of Serbia, ICTP-Trieste, and Faculty of Science and Mathematics University of Nis for financial support. Many thanks go to Prof. Zoran Knezevic and colleagues from Astronomical Observatory Belgrade for their engagement in this process.