Search for more books on your topic using these online / ebook databases listed below. (Some of these eBooks are available to download into your mobile devices.)
Full-text electronic medical library; included 26 titles including CPT Data Files, Davis's Drug Guide for Nurses, 5-Minute Clinical Consult, ICD-9-CM, ICD-10-CM, ICD-10-PCS, Burket's Oral Medicine, AHFS Drug Information (2020), APhA DRUGInfoLINE, Pharmacology World and Scientific American Medicine.
Here are a few books related to Occupational Therapy - just as a sample for you to have an idea. You can search the databases listed in the box on the left to find a book of your choice needed for your research.