All reviews are written independently by our editorial team. A.J. Jacobs is the author of "The Know-It-All" and "The Year of Living Biblically." In his new book, "The Year of Living ...

Author A.J. Jacobs breaks down why you should be thankful you’re celebrating Halloween today and not in eras past. The nostrils of our ancestors were constantly assaulted by unimaginable odors.

For more than a year now, author A.J. Jacobs pulled on woolen leggings more often than you put on socks. Why? "A couple of years ago, I realized I had never read the American Constitution," he said.

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