"The Dictionary may be consumed straight-up as an aperitif or Difference Engine appetizer. It may also be taken as needed while reading The Difference Engine, as a History Supplement. You can choose from the list of entries in the index, or you can browse from A to Z, using the Browse link at the bottom of each page."
Last chapter! The last chapter bites! Careful there! That last chapter is the reason I wish I could make a Difference Engine into a movie. It kicked me out of my senses.