I don't tend to like nursing books published by Springhouse, their quality and depth is usually lacking (from my experience).
Springer Publishing has an excellent series of books on geriatric nursing.
Some other excellent titles (there are newer editions of most):
Burke, M. M., & Walsh, M. B. (1997). Gerontologic nursing -
wholistic care of the older adult (2nd ed.). St. Louis, MO: Mosby
Ebersole, P. , & Hess, P. (1998). Toward healthy aging: Human
needs and nursing response (5th ed.). St. Louis, MO: Mosby
Eliopoulos, C. (1997). Gerontological nursing (4th ed.).
Philadelphia, PA: Lippincott-Raven Publishers.
Lueckenotte, A. G. (1996). Gerontologic nursing. St. Louis,
MO: Mosby Year-Book, Inc.
Matteson, M. A., McConnell, E. S. & Linton, A. D. (1997).
Gerontological nursing - concepts and practice (2nd ed.).
Philadelphia, PA: W.B. Saunders Company
Miller, C. A. (1995). Nursing care of older adults - theory and
practice (2nd ed.). Philadelphia, PA: J.B. Lippincott Company.
Tideiksaar, R. (1997). Falling in old age: Prevention and
management (2nd ed.). New York, NY: Springer Publishing
--I really likes Matteson & McConnell's book, and Tideiksaar has done some excellent research on falls