Interesting book. Thanks Ken.

Other classic American books are:

Domestic architecture of the American colonies and of the early republic By Fiske Kimball
http://books.google.com/books?id=ApwsAAA...own&f=false

These are not free, but they are classics:
Anything by Frank Cousins such as:
http://books.google.com/books?id=75oaAAAAYAAJ&printsec=frontcover&dq=inauthor:%22Frank+Cousins%22&hl=en&ei=L1xFTeraLoL2gAf1p8neAQ&sa=X&oi=book_result&ct=result&resnum=2&ved=0CDAQ6AEwAQ#v=onepage&q&f=false

Anything by Robert Blair St. George:
http://books.google.com/books?id=PcT9nDI8Q-wC&printsec=frontcover&dq=inauthor:%22robert+blair+st+george%22&hl=en&ei=H11FTZHLHIrZgQeuoKiUAg&sa=X&oi=book_result&ct=result&resnum=1&ved=0CCcQ6AEwAA#v=onepage&q&f=false

or anything by Henry Chandlee Forman such as:
http://books.google.com/books?id=AK0yAQAAIAAJ&q=inauthor:%22Henry+Chandlee+Forman%22&dq=inauthor:%22Henry+Chandlee+Forman%22&hl=en&ei=jF9FTYXlN4_rgQfHp5GHAg&sa=X&oi=book_result&ct=result&resnum=6&ved=0CDwQ6AEwBQ


If you have a good idea of what you are looking for, the Vernacular Architecture Forum maintains a searchable bibliography currently over 26,000 books and articles:
http://filemaker.umw.edu:591/FMRes/FMPro?-DB=VA%20Bibliography.fp5&-Lay=Layout%20%231&-Token=25&-Format=ZTableVw.htm&-Error=ZErr.htm&-Findall


That should keep you busy!

Jim


The closer you look the more you see.
"Heavy timber framing is not a lost art" Fred Hodgson, 1909