Time to begin reading The Battle of Quatre Bras again (especially if you want to get to the battle by June 16th).  This is the 202nd Anniversary of the battle.  I can't say enough about this book.  It is an excellent account of a Napoleonic battle.  The one shortcoming that can be leveled at it (though the author freely acknowledges this) is that the view from the French side is somewhat lacking. 

Not to worry, though, you can follow up reading Mike's book with this one, Prelude to Waterloo Quatre Bras by Andrew Field, which provides the view from the French side:

When you have digested those two, move on to The Battle, A New History of Waterloo: