A Dictionary of Intermediate Japanese Grammar
PL 533 .M252 1995 (Reference) 200 grammatical items, arranged in alphabetical order by romanized spelling, are explained in depth. Many tips, examples, and useful appendices.
Making Sense of Japanese Grammar : A Clear Guide through Common Problems
PL535 .C65 2002 (3rd Floor) "Explains in a lively and highly informative manner basic principles that underlie a wide range of phenomena in Japanese." [from the publisher]