His answer was the book The Goal that took 13 months to write. After completion, the book was not well received by the company staff and by large publishers. Finally, with help from Larry Gadd, the owner of North River Press, the book was published and became a great success. After a while, Goldratt noticed that many implementations were conducted using the book but not the software. This caused further stress in the company and Goldratt tried to capture the essence of how to implement the solution directly in what is now known as Drum-Buffer-Rope method. He published The Race to explain some of the concepts he was working on and developed a course to teach people how to manage their production using a computer simulation game.