Studying Japanese

Below I mentioned some useful books that I have used, as well as a few useless ones. I would also be very careful about any websites run by amateurs--especially non-native Japanese speakers to learn kanji or vocab. I got a vocabulary list off of one such site and showed it to my Japanese teacher and it had numerous errors. Kanji listed was obsolete, definitions were incorrect, or only half right. The guy had put a lot of work into it, and was well-meaning, but unfortunately it won't help anyone if they learn useless kanji, or words with incorrect meanings...