この一冊で合格する is a book series for JLPT preparation created by 日本語の森 Nihongo no Mori, which started out as a YouTube channel in 2013. As of March 2022, they currently have editions for the N2 and N1 levels — N2この一冊で合格する, and N1この一冊で合格する.
This series is designed to be a one-stop-shop for studying for and passing the JLPT. Both the N1 and N2 versions are structured exactly the same and contain a trove of useful content related to each level of the test. These books begin with a brief explanation (in Japanese) of the JLPT at each level, followed by a content breakdown, a chapter dedicated to vocabulary and kanji, a chapter about grammar, another about reading, and finally a chapter about listening. At the end of each book are two mock exams, answer sheets, listening exercise scripts, and a marksheet.
Each book consists of four chapters: vocabulary, grammar, reading and listening.
The vocabulary and kanji chapter is simply a long checklist of words generally grouped by structure – single kanji words, two-letter kanji words, words with a mix of kanji and hiragana, katakana words, and more. No definitions are provided; it seems like readers need to look up any words they are unfamiliar with.
The grammar chapter presents similar grammar points together with an explanation in Japanese, how to form each grammar pattern, and a few example sentences. After five to ten related grammar points are given, you will find exercises afterward that utilize each one in formats seen on the actual JLPT. The N1 book has 130 grammar points while the N2 has 135. As far as I can see, there are no overlapping or repeating grammar points between each version.
The reading chapter begins with tips and tricks for solving questions involving reading problems. Things like connecting phrases, conjunctions, and explanatory words are spotlighted. There are plenty of examples given, followed by practice problems organized by passage length and type.
The final chapter deals with the listening section of the JLPT. Examples, explanations, and practice listening questions are organized based on five different types of questions that usually appear on the exam. The audio quality is decent and the 日本語の森 voice actors do a good job of recreating what you would hear on the actual JLPT listening sections.
These books seem like great resources for anyone thinking of taking upper-level JLPT exams. After creating a paid account, you are able to access PDF versions of these books. Physical copies are also available to order through the LINE app for those who live in Japan. In case you are just looking for a list of vocabulary and expressions you can use to prepare for the JLPT exam, there are also editions that only include the vocabulary portion of these books: N1 4000 Essential Words and N2 3500 Essential Words — English and Chinese versions respectively. These vocabulary-focused editions have translations alongside the vocabulary as well.