These 2 books are specifically about 1:12 scale poseable figure sculpting using polymer clay that we have found helpful (there are other methods of constructing doll house dolls).
One of our favorite books is by doll artist James Carrington. It covers all aspects of sculpting the poseable doll house scale character doll with polymer clay. The book includes information on plaster mold making and wigging.
The second book pictured here is by Sue Heaser. It covers another technique of making a poseable doll house figure with polymer clay, wigging and includes some period costuming.