Baroness Emmuska Orczy 
The Triumph of the Scarlet Pimpernel 

If you thought the Pimpernel had it rough with Chauvelin on his trail, try adding Citizens Robespierre, Couthon, Louis Antoine St. Just, and the beautiful Theresia Cabarrus, fiancée of Tallien. Robespierre becomes paranoid about the Pimpernel and must have him destroyed. Theresia is sent to seduce the elusive hero. And, just to make certain everything goes according to his plan, Chauvelin has Marguerite kidnapped and imprisoned!
Can Percy continue to disguise himself as Rateau and get away with it?
Can Robespierre maintain power when betrayal is stirring in every corner?
Will Marguerite be rescued without suffering the death of her husband?
Will Chauvelin ever learn to tie his cravat properly?! Or will this be the end of the Scarlet Pimpernel!?