If you are looking for a comprehensive book that meets today’s learning system’s needs, then you should buy Essential Elements for Strings. Just like book 1, this book also provides you with many precise lessons.
You should buy both book 1 and book 2 to get a complete understanding of the violin playing. In the first book, you will learn the basics. However, book 2 takes you to the next level by introducing advanced level methods, such as playing chords, flat notes, etc.