Librería Samer Atenea
Librería Aciertas (Toledo)
Kálamo Books
Librería Perelló (Valencia)
Librería Elías (Asturias)
Donde los libros
Librería Kolima (Madrid)
Librería Proteo (Málaga)
This book was originally published in 1930 as a call to Adventist laymen to take up the work of the three angels of Revelation 14 and proclaim the gospel and the second coming to every nation, tongue, kindred and people.