Start with high-confidence geriatric nursing books, then narrow by subgenre or adjacent topics.
The Needs of the Dying
David Kessler
A Dignified Life
Virginia Bell MSW, David Troxel MPH
Palliative Care for Advanced Alzheimer's and Dementia
Gary Martin PhD, Marwan Sabbagh MD FAAN
A Loving Approach to Dementia Care
Laura Wayman