Anorexia Recovery & Treatment

Are there any free online workbooks for anorexia or eating disorders not otherwise specified? If not, can you please recommend some good workbooks that I can buy? I’m 18 and have not been diagnosed yet but the doctor thinks I’m anorexic. I do have most of the symptoms and I will be going to an eating disorder specialist shortly but I thought maybe a workbook would be good to start off with. Thanks in advance.