Could be that some of these new Mobi eBooks are huffdic compressed and Mobi2IMP will not yet work with them because of the face that Mobi2HTML does not work with huffdic compressed Mobi eBooks. I've put in a request to allow Mobi2IMP to use Mobi2OEB as well since Mobi2OEB works with huff-dic compression. Once that's done, then you might be able to get these eBooks converted with Mobi2IMP.
But for now, you can download and install Calibre and use Mobi2OEB on these eBooks and then run them through eBook Publisher to make them IMP format. You might have to edit the HTML a little in some cases. But it's still better then not being able to convert.
|