Title: Uma Viagem ao Tempo dos Castelos
Description: Historical novel about a scientist and his two young friends, a brother and sister, that travel in time back to the reign of King Afonso I of Portugal.
Subjects: Portugal, castles, history, science, time travel, brother and sister, novel
Places: Portugal, Marão
People: king Afonso I of Portugal, Egas Moniz
Time periods: The Middle Ages, XII century, medieval period, XX century