Please use this thread to recommend study books and CDs (NOT music CDs) for studying Japanese. Do not spam this thread: only post if you are recommending something.
Here is an example of how it must be written:
Level: (beginner, intermediate, etc)
Why?: (your reasons for recommending this book)
Please also feel free to post a link to a place to buy the book (ie, Amazon) The more information about the book, the better.