The book is created by :
Scuola Primaria Paritaria "San Tarcisio" di Ercolano, Italy
Szkoła Podstawowa im. Kardynała Stefana Wyszyńskiego w Runowie, Poland
137 th Secondary School “Angel Kunchev”, Sofia, Bulgaria
Základní škola Kroměříž, Komenského nám. 440, Czech Republic
Secondary School "St.Ivan Rilski", Sofia, Bulgaria
The book is under the Creative Commons license
CC BY-NC-ND