I can't really remember where I brought this book, but that doesn't matter as it is a must buy for any Architectural/Construction students. I study Architectural Technology and have bought many Architectural books over the years, but you mostly end up with pretty photos which is great if you like looking at pretty building with out learning anything.
I believe having cross sections and details of the buildings in question is the best way to learn how the building connects together and how it stands (Which is a must if your designing buildings). This book has many beautiful residential buildings as well as images, cross sections and a CD with the cross sections in dwg format for CAD users.