Here are a list of books I've found useful:

Understanding Homeopathy: Introductions to Homeopathy

• Homeopathy: Beyond Flat Earth Medicine; Timothy R. Dooley, N.D., M.D.
• Homeopathy: The Great Riddle; Richard Grossinger.
• Impossible Cure: The Promise of Homeopathy; Amy Lansky, PhD.

Home Prescribing

• The Complete Homeopathy Handbook; Miranda Castro, R,S.Hom. 

 In-depth Study

• The Organon of the Medical Art; Samuel Hahnemann.
• The Science of Homeopathy; George Vithoulkas.
•  Desktop Guide to Keynotes and Confirmatory Symptoms; Roger Morrison, M.D.
  

Animals 

• The Homeopathic Treatment of Small Animals; Christopher Day, MA, VetMB, VetFFHom, MRCVS.

History of Medicine (view, Homeopathic)

• Divided Legacy: Volumes 1-4; Harris Coulter, PhD.
  

Homeopathy and Science

• Homoeopathic Science and Modern Medicine, The physics of healing with microdoses; Harris L. Coulter, PhD.