The book has 15 chapters written by the following authors and co-authors from USA, England, China, Poland, Serbia, Bulgaria, Slovakia, and Romania: Florentin Smarandache, Ştefan Vlăduţescu, Jim O’Brien, Svetislav Paunovic, Mariana Man, Zhaoxun Song, Dandan Shan, Maria Nowicka-Skowron, Sorin Mihai Radu, Janusz Grabara, Ioan Cosmescu, Adrian Nicolescu, Krasimira Dimitrova, Alina Țenescu, Sebastian Kot, Beata Ślusarczyk, Maria Măcriș, Iwona Grabara, Piotr Pachura, Mircea Bunaciu, Jozef Novak-Marcincin, Mircea Duică, Odette Arhip, Vlad Roșca, and Vladimir-Aurelian Enăchescu.