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Old 05-09-2021, 02:28 AM   #4
kovidgoyal
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It is an inherent limitation. The EPUB file is internally broken up into individual html files which are rendered one at a time. There is no way around that, short of either butchering the files to merge them into one or rendering multiple files simultaneously which is an absolute bear in terms of performance, code complexity and robustness. I am guessing iBooks does one of those. I am not going to.
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