[Geoff Bacon]

Sounds as though you could work in portrait mode provided the pages displayed properly so, working on that basis, have you tried cropping the individual pages ?

To crop, press centre of screen and press the second icon at bottom left (mountain range (or 2 tents?) in a rectangle)
Then choose crop from the sub menu.
Drag the sides of the selection rectangle to the appropriate point and save the page (top  right).
Repeat for the other pages.

If you would prefer landscape, do the same in that orientation.

Geoff