The Australian Colonial House. Architecture and Society in NSW, 1788-1842, by James Broadbent.
 
This is considered the definitive study on colonial houses in the first  approximately 50 years of white settlement
 
This is a large hard-cover with a dust-wrapper. It is one of 2000 copies published by Hordern House in 1970. There are a few small brown marks on the top of the text block shown in the photo, the book and cover are otherwise near fine.