Overall, HSK covers 5000 words and phrases, 150 of which are part of HSK 1. This book contains the current list of HSK 1 words last updated in 2012. All words come with Pinyin and except for the first 5 pronouns, all vocabularies also come with at least one example sentence helping you to not only learn the word but also understand the way it's used within sentences.
To successfully pass HSK 1 there are further topics for you to consider like grammar or listening. 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!