My thread is probably gonna get relocated, but I would like to know, since there seems to be quite a number of polyglots here, nevermind Germans, what are some good serious coursebooks to learn German by oneself.
I want to avoid the usual “traveller’s guide” where it’s just a phrasebook, but want something fundamental and methodical. e.g. step by step German grammar along with basic conversations or stories to build vocabulary and get a sense of the language at work, learning declensions and conjugations step by step, etc.
thanks for your suggestions in advance.