"Gravitation and Spacetime" is a text book written by Remo Ruffini and Hans Ohanian.
Currently, this book is available in four languages:

English edition	Italian edition
Korean edition	Chinese edition

Third Edition https://www.cambridge.org/core/books/gravitation-and-spacetime/241957A2AD43A3C319336B28833CB3E9

 Moreover, there is a work in progress on an Arab translation and a Vietnamese one.