[Japanese grammar books]
600 Basic Japanese Verbs: The Essential Reference Guide: Learn the Japanese Vocabulary and Grammar You Need to Learn Japanese and Master the JLPT.
This book will be an essential resource for students wishing to learn Japanese as it shows how to conjugate the 600 most common Japanese verbs quickly, and with very little effort. This is the only guide to list all verb forms in both Japanese script and romanized form, while giving an accurate English translation for each conjugated form, making this book far more comprehensive than any other book on the subject.