A2: DDA
The Ann Arbor Downtown Development Authority has released the final version of its State of the Downtown Report, which is available for download as a .pdf file from its website. It features a raft of statistical information about the district, ranging from acreage, to building square footage by category, to population trends, to real estate occupancy rates, to crime trends, and the like. Interspersed through the text are photos, including a cover photo by Seth McCubbin. [Source]