= Gravity's Engines =
=== 523.8875 Hillsboro Caleb Scharf 2012 ===
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Was hoping to find information on lensing, density, size distribution, perhaps some numbers.  Instead, the book is metaphors, personalities, and gossip.  I read about halfway through and decided I wasn't Dr. Scharf's audience.

As I vaguely recall, Copernican Complex had some useful information.