Previously I featured online books found at Issuu. Today I'm presenting a handful of books that can be downloaded as PDFs, though these just scratch the surface on architecture-related books that can be found in this format. The last illustrates how even books online don't have to be books in the traditional sense, but can be other content formatted into PDF pages.
[Reinventing Grand Army Plaza by Design Trust for Public Space | 6mb PDF]
[Street Design Manual by NYC DOT | 6.8mb lo-res PDF | 198mb hi-res PDF]
[Always Building by Jim Long, Jennifer Magnolfi, Lois Maassen | 5.5mb PDF]
[A synchronicity: Design Fictions for Asynchronous Urban Computing by Julian Bleecker and Nicolas Nova | 500k PDF]
[The 21st Century Interior by D.J. Huppatz | 1.75mb PDF]
Know of others? Please leave a comment below with a link.