Assimil
Century-old bilingual course books that take you from zero to solid B2.
BooksCoursesPaidBeginnerIntermediateA1–B2Any language
What it actually is
Each course is ~100 short bilingual dialogues with native audio: you passively absorb for months, then start an 'active wave' translating back into the target language. Books run around €30 (e-courses ~€50) across 70+ languages, and the method is a long-standing favourite among polyglots for reaching real reading fluency. Caveats: many courses are only published from French, the humour is dated, and it demands daily discipline with no gamification to carry you.
What it covers
- Reading
- Listening
- Grammar
- Vocabulary