This book does a nice job of surveying the portable housing around the world in traditional and upscale modern applications. However did not cover the mobile home, RV's, double-wides and Modular industries here in the US which is the largest use of mobile housing in the world. Yeah I know, no style, history of crappy cheap construction and lot's of bad press. Regardless, millions are still sold and built in the US and will continue to be, as Mobile housing fits our culture and pocketbook better than Mac-mansions do ! Portable houses does a great job of introducing what other cultures have and continue to use.