I The Portuguese edition is available from following url in Amazon.com
https://www.amazon.com/Teoria-relatividade-avalia%C3%A7%C3%A3o-civiliza%C3%A7%C3%A3o-Portuguese/dp/6200990778/ref=mp_s_a_1_4?qid=1692171906&refinements=p_27%3ASahriar+Ahamed&s=books&sr=1-4