Line by Line can work for anyone, whether you are a first time pool buyer, or are a seasoned veteran pool owner. How do you make Line By Line work for you? You have to read the book and follow the recommendations. Simply put once you have read the book, put your new found knowledge of the swimming pool construction agreement to work! Do Not just take the pool salesperson or builder's word at face value. They may not know themselves exactly what they are talking about, through no fault of their own.