What format are the eBooks in? If they are PDF's all you should need is Adobe Reader -
http://www.adobe.com/products/acroba...erforpalm.html
From another post you created (two posts for essentially the same thing - naughty naughty ;)), you said your eBooks were PDB's. In that case, you could try this -
http://www.download.com/PDB-Converte...-10187782.html
Converting from one file format to another doesn't often give great results, so you might be best just to leave them in the format they are in.