Re: 日本語勉強:本、cd (books, cds)
I highly recommend this:
Title: A Dictionary of Basic Japanese Grammar
Author: Seiichi Makino, Michio Tsutsui
Publisher: The Japan Times
ISBN: 4-78910-0454-6
Level: beginner level
Why?: It contains explanations of all basic grammar points you will encounter in your study of elementary Japanese
Actually, I recommend getting this as a 3-book set: A Dictionary of Basic/Intermediate/Advanced Japanese Grammar so you will always have a great reference no matter where you are in your Japanese language study :)
I also used Minna no Nihongo extensively when I was studying so I recommend that too :)