Where can one buy wooden dolls house furniture?

The Doll People doll house has not been made. A close substitute might be the Federal Dollhouse Kit, available unassembled from the Real Good Toys Company, and available for purchase at http://www.dollhousesgalore.com/ (and at many other sites and stores that sell dollhouse kits.) The kits require a great deal of assembly, and are time-consuming. If you want a replica of the house in The Doll People, your best route is to find a local dollmaker (ask at hobby supply stores) and commission a local craftsperson to build this house for you. The book has pictures of the house, and the design looks very straightforward. Good luck!