The book provides set phrases. While useful, it does not teach the user how to construct sentences dynamically. If a conversation deviates from the script provided in the book, a beginner might find themselves stranded. It teaches what to say, but not necessarily why the grammar works that way.
Andrei began to reconstruct the life of the book’s owner. Ghid De Conversatie Roman German Niculescu.pdf
A typical Niculescu conversation guide follows a thematic, phrase-based layout: The book provides set phrases
"Vorbește încet, dar mergi departe." (Speak softly, but go far.) It teaches what to say, but not necessarily
"Niculescu," he whispered. The name carried the weight of an era. These guides were printed in the 1970s and 80s, during the harshest years of the Ceaușescu regime. They were not meant for casual holidays. In a country where travel was forbidden and the borders were barbed wire, a German conversation guide had only two purposes: commerce with the "brotherly" socialist state, or escape.