ePub is actually best. For one thing, LRF is unique to Sony. So if you get a different reader later on, ePub will most likely still be usable. But LRF won't be unless it's a Sony. So say you got your spouse an EZ Reader, then the ePub you have on your Sony will work on the EZ Reader. ePub is a forward thinking format, LRF is a dead end format.
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