The Little Book of Book of Mormon Evidences - John Hilton III (3 of 5 Well-Known Secrets)

I picked up this little book (80 small pages or so) at Smith's.  I read through it while following one of my friends around as he gathered groceries.  This book is basically just a superficial compilation of all the random facts you've heard in your gospel doctrine classes.  It covers such things as author writing styles, fossil records of elephants in the US, chiasms, Hebrew quirks, etc.

If you're looking for some deep doctrine, or a text for serious research, this isn't it.  However, if you want to share some light factual information with a non-member or perhaps a younger brother or sister, this might be it.  Besides the facts, it also includes a good introduction and close about how one should always seek a genuine witness from the spirit, rather than rely completely on facts.