Drill & Excel On the Piano – Read Music Like a Pro book 4 is for the late intermediate student. This 165 book has everything from the previous 3 books, with the first chapter being a recap of the previous books. Starting with chapter 2 it includes many new rhythms with odd meters with new bottom numbers. And there are tons of new theory, including altered intervals, triads and triad numbers, and 7th chords, with multiple worksheets to fully understand the student. Of course, there are more exercises and special exercises for specific skills included in the songs. The scales are the keys of C, G, D, A, and F to recap, then B flat and E flat is added. Best of all, 60 songs, written beautifully and specifically for what is taught in each chapter. By the end of this book, a student is ready for a college degree or a performance career!