For sure, advanced difficult topics were never really their forte', although it was really common to get great book or blog recommendations via comments. For me, the golden combination was a good book on the language/framework/topic I was stuyding, supplemented with specific Q&A from Stack Overflow. I have extremely fond memories learning C++ and Qt that way (although that Qt book was a little rough, but at least there was a Qt book. Nowadays every book just seems too outdated to be helpful).