This could be a defective epub file or, more likely, a matter of selecting the correct font.

I try View --> Character Endoding --> various options,

but I can't actually toggle characters, it always reverts to Unicode (UTF-8).

Any suggestions? Thanks.

image »

I'm inserting a link to an image, but it doesn't show up in the preview, not sure if it'll work therefore. Just in case, the link to the image is: www4.picturepush.com followed by photo/a/11189222/640/11189222.jpg
This seems to be a defective epub file. The content files seem not be saved in UTF-8 encoding which is required by the epub specification.
Thanks mikelv,

I have other epub books in Spanish that are read properly, so you must be correct.