02:00 — Catch a FREE sneak peek of America's Book of Secrets, before the new season premieres on Saturday, March 29.
01:59 — Catch a FREE sneak peek of America's Book of Secrets now, before it premieres on Friday, April 5!
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- Premiered: January 15, 2012
- Rating: TV-PG
- Premise: History's mysteries unfold in a look at secret facets of U.S. institutions and structures. (more)