Book 25 in the Asterix series. 

Can there ever be a happy ending for star-crossed lovers Melodrama and Histionix, whose fathers are rival chieftains of the same village? The only hope is to call in Asterix, Obelix and Getafix to sort out the feud, the intriguing of the sinister traitor Codfix, and the military might of Rome. Watch out for some interesting new magic potions...