Useful book. I find it as useful as “501 Spanish Verbs”. Each of these books has something the other does not. 501 Spanish Verbs has many practice exercises at the end of the book, and there are different types of exercises, including fill-in-the-blank, multiple choice, and crosswords. My version does not come with an audio CD, but I think there is a version that does, but I do not know what is on it. So 501 verbs offers clear explanations with examples at the beginning of the book, charts of conjugations in all tenses of several of the most popular verbs in the middle, and the exercises at the end with answer keys. 2000+ Essential Spanish Verbs offers the charts as well as exercises at the end, but the exercises are not varied. There are exercises such as reading “dialogue” and answering questions based on it, as well as translating sentences. Also, this book comes with an audio CD which has the program “[Spanish] Before You Know It”. There are flashcards of several of the most used words to help with your vocabulary. They are in several different sections such as, “Weather”, “Verbs”, “Foods”, among many others. A native speaker will say these words when you click on them, and you can add your own words on the lists (or make your own list) and there are exercises to help you remember the words. (Writing them when you see the English equivalent, writing the english word for the spanish word that is shown, you can see how many you get right) among others. (I actually have not used the program very recently, so I don’t remember all the details, but it is very useful!) It’s awesome that you can get the book AND CD for about $15.