The primary purpose of this study is to compare the effectiveness on the disability of low back pain patients of The Back Book, The Back Guide, and a control intervention (generic recommendations on general health). Patients are divided into 3 groups:those who receive The Back Book (classic education), those who receive The Back Guide (cognitive behavioral education) and the control group). They are patients who consult a physician at the primary care consults of 14 different Health Centers in Spain. The sample size is 240 subjects.