As someone who has undoubtedly read the book a few times by this point, I am sure you realize that we do not advocate going ass to grass. However, you do need to get below parallel. Right now, you are several inches high. Your stance is too wide, your toes pointed straight ahead, your knees are not out enough, you are looking up, you are lifting your chest, and your thumbs are wrapped around the bar. Have you read Starting Strength? There's a fair amount of background material there that I cannot cover here. All of those things are form faults. Do me a favor, review the squat chapter and try this again. Let's see what you come up with.