Are you preparing for HSK 6 and need a book to study vocabularies building on top of the vocabulary needed for HSK 5? This HSK 6 vocabulary guide might be exactly what you are looking for providing a clear list of vocabularies that should be studied before tackling the final level of HSK.
Overall, HSK covers 5000 words and phrases, half of which are part of HSK 6. This book contains the current list of HSK 6 words last updated in 2012 (which are still the last changes that have been made). It covers HSK vocabularies 2501 to 5000. If you haven't studied the first 2500 vocabularies yet, make sure you do that before starting with this guide. All words in this book come with Pinyin and English translation.
To successfully pass HSK 6 there are further topics for you to consider like grammar or listening which are not covered in this book. This book concentrates on helping you to build the foundation that allows you to then accelerate further learning in courses, with mock exams or whatever other form of studying works best for you. Good luck!