The Bradbury “mysteries” are completely new to me. Discovered them by accident looking for something else. Similarly, Isaac Asimov did a load of non-SF which are most enjoyable; written with a great sense of fun.
Have read Clarke’s 2001 series. OK but not his best. For me that’s The City and The Stars set in the very far future. Marvellous ideas and an extraordinary sense of place – you feel you know what it is like to live in Diaspar, the future city in which it is based.