The hotel Montparnasse Rive Gauche is actually unavailable.

Some links to help you to find and book an hotel in Paris :

Hotels Paris : Large selection of hotels located in the heart of Paris.
Hotel Les Jardins d'Alésia : 2 star hotel located rue d'Alésia in the 14th district of Paris.
Hotel Résidence Quintinie Square : Appart Hotel located near Porte de Versailles.
Hotel Moulin Vert : Hotel with a nice location between Montparnasse and Porte de Versailles.
First Hotel Paris : Design hotel located near the Eiffel Tower, Montparnasse and Invalides.
Hotel Le Fabe : Nice and modern hotel located near Montparnasse and Denfert Rochereau.

Access

Subway station Pernety (Line 13) or Alésia (Line 4).