A Frontier in Medical Science. North Atlantic, 1995. This is the most notable book on homeopathic research to date. There is also some excellent chapters that present compelling theories on how homeopathic medicines may work, in the light of new physics, biophysics, fractals, chaos, and complexity theory.
Some chapters are technical.
Kluwer Academic, 1994. A compilation of articles on basic science research. Kluwer Academic, was published in 1998. The Similia Principle in Self-Recovery. This is a highly technical book which discusses research by cell biologists.