Gorr ends the book with a simple instruction: "Don't practice this until you get it right. Practice it until you can't get it wrong."
Whether you buy the official digital edition or hunt down the rumored "complete" scanned PDF from the early 2000s, the content remains the same: the serious jazz book ii pdf
If you do not know your major scales cold, or if you cannot spell a Cmin7(b5) chord instantly, put the PDF down. You will get a headache. Gorr ends the book with a simple instruction: