The Traveler's Notebook has almost limitless possibilities when it comes to the refills inside. Want to use more than one refill? Easy with the Traveler's Notebook Connectors.
For two notebooks.
First insert one notebook under the binder elastic as you normally would.
Close that notebook to one side and place the next notebook on the other side of the cover.
Then connect the two notebooks through the centre fold with the Traveler's Notebook Elastic.
For Three Notebooks
Line up two notebooks of your choice spine to spine then connect them together with the Traveler's Notebook Elastic along the centre fold.
Place them in to the Traveler's Notebook cover under the binding elastic (so it runs between the two journals).
Finally insert the third notebook as you normally would under the centre elastic.