New Perfect Master Grammar Japanese Language Proficiency Test (JLPT) N4 (with English Translation)

I think this book is fantastic. Be warned that there really is not much English in this book. The format is basically this: Left side of page - introduces 2-3 grammar points that are similar. Includes a very short English explanation and several example sentences. Right side of page - 10 to 25 practice problems (answers in the back of the book) The thing that is so good about this book is that the example sentences and practice problems are extremely well designed. They are not just random sentences that happen to contain the grammar point, they are carefully crafted to be clear and easy to understand while demonstrating a specific way to use the grammar point. A great example about being clear is in the section about ni vs de. One of the practice problems basically says (my translation, from memory): "We built a window [in] the room. Afterwards the room was brighter." They could have just written the first sentence, but they included the second to remove any trace of ambiguity (are they building the window INTO the room or are they building A window in room that is going to be placed somewhere else (is that possible?)). I absolutely appreciated when they did that, every time. I was familiar with 75% of the grammar going into this book, but I learned something worthwhile on every page. If you have any doubt about your N4 grammar, pick up this book.