A new e-book reader software is in the town! Smart Book 3
is a multi-lingual e-book reader for Windows Mobile 2002/2003-compatible smartphones. It reads prc and txt files, supports various font sizes and is available for $19.95.
Alternatively, if you the small screen of your smartphone doesn't scare you away, you may want to try either iSilo or Tiny eBook Reader for reading e-books.