It's called The New Wave of American Heavy Metal.  The author apparently runs a website called www.rockdetector.com.  I had no idea that this was even coming out until a friend informed me that he read about it a couple of days ago.  Here's part of the description from http://www.zondabooks.com/titles/nwoahm/  (where you can purchase the book):

"Features over 600 U.S. and Canadian Alternative Metal, Emocore, Hardcore, Math Metal, Metal, Metalcore, Neo-Thrash and Screamo bands.

Heavy Metal is the ultimate survivalist, weathering every trend, every fad. In the mid 90s, in the wake of Grunge, the Metal movement underwent its most radical evolution to date, ushered in by a leaner, meaner crop of purist, aggressive acts in PANTERA, MACHINE HEAD, BIOHAZARD, LIFE OF AGONY, PRONG and SLIPKNOT as Thrash fused with Hardcore and Death Metal.

As the millennium dawned this new found power exploded not only onto the US touring circuit, but also the national album charts giving rise to a new generation of offshoots as Screamo, Emocore and Metalcore.

In traditional Rockdetector style executive editor Garry Sharpe-Young, author of 14 Rock & Metal titles to date, exhaustively documents these bands in painstaking detail with extensive historical biographies, line-ups and full discographies including track lists, labels, catalogue numbers and chart positions."

There's a complete list of featured bands there, too.  Weird, man...too weird for me. 

--Bryan