Basic Japanese Through Comics (parts 1 and 2)
Two books comprising a series of 24 articles from the now defunct magazine Mangajin. Each article covers a word or phrase such as どうも、どうぞ、すみません、or はい。Using manga to illustrate their points they go through various nuances of the word or phrase. Each dialog is presented in kana and kanji, romaji, a literal translation and an English translation. It is also scored from 1 to 4 for politeness, 1 being rude and abrupt. 4 being very formal.
These are very interesting books and can be dipped into rather than used as a textbook starting at the beginning and pressing on to the end.