Quote:
Originally Posted by Owl_
I found two epubs of over 130MB  Both of them have inside pictures and links. I converted them with kepubify and they're working well!!
So now two questions naturally rise:
How did the author make them? 
Which is the real size limit of an epub? |
Quite a few tools will make large epub files. For the most part, if you look at the structure of an epub (any unzip utility will work, I use 7Zip), you'll find the majority of the total file size comes from images. My current record holder is a biography/cook book with lovely images for each recipe. This results in a total file size of 562.4MB of which 561MB is images. Embedded fonts take up another 800K.
As for size limits, as long as the html/xhtml files don't get horrendously large (I've created test epubs with 1-2MB files and they worked but with some performance issues when using links between chunks) and keep the images to reasonable sizes, the maximum size is more likely to be limited by your devices hardware and software than any innate size limit in an epub.
Edit: with older ereaders using RMSDK, there were issues with larger html files leading to a recommendation of 300K maximum per html file. That has not been an issue with Adobe ADE/RMSDK since ~2009.