I couldn't get "Send to device(iPad)" to work so I selected 36 to convert TXT to EPUB and these are the results at point of "hang"?....
Half the books took between 3 seconds to 40 seconds to convert but one has taken an hour and is still converting.
One book is .4Mb and took 48 minutes to convert. The biggest book is 1.2Mb and took 54 seconds to convert.
The book that took 3 seconds to convert is .1Mb.
I know size isn't important (

) but why would a 1.2Mb text book take less than a minute to convert and another .4Mb text book take 48 minutes?
Two books are still converting 1) .4Mb - 65 minutes and still converting and 2) .8Mb and taken 61 minutes so far. Both are set at 1%
Is this kind of disparity of timing normal?