In addition to what's been said, I would suggest that you find several books on the basics of photography with a large, illustrative section on exposure measurement.
As far as "bracketing" itself is concerned, you could read Ansel Adams' book on the topic, but then you'd probably start talking about taking "Calculated Safety Shots". ;>)
One of the more interesting and still valuable books on photography - at least, "seeing" photographically, is "The Eye of Eisenstaedt" by Alfred Eisenstadt, one of the original photographers for Life magazine. Part biographical, part photographic "seeing" and part technical.
Although it is out of print, copies should be available through your local public library or through either or the two web sites below.
abe.com (American Book Exchange)
alibris.com
Both are excellent resources of good used and new books, etc.
Hope this is somewhat useful.
Bill