You can't go wrong with the APA geri psych textbook--haven't read it but flipped through a little for certain things and seems good. Although I've also found just looking into bereavement, demoralization, existential-type topics, and reading the Neurology overviews in Continuum for dementias, stroke, movement disorders, sleep issues, etc has been the most helpful for day to day things for me. I'm not geri trained though, so take it as a grain of salt.
