: Most Assimil Norwegian courses use French as the base language. If you are looking for an English-to-Norwegian version, ensure you are checking for the latest "With Ease" series, as some older versions may only be available in French or German.
: If you only have the PDF, try to find the accompanying audio files. The Norwegian "pitch accent" and melody are difficult to master without hearing native speakers. Note on "Assimil Norwegian" Availability
You can find and create study materials for (often titled Le Norvégien sans peine or Norwegian Without Toil ) by accessing existing PDF copies or converting the content into physical study "papers" or flashcards. Finding the PDF