There's something wrong with the file, I think. Calibre says this: calibre, version 7.6.0 ОШИБКА: Необработанное прерывание:: <b>TypeError</b>:sequence item 1: expected str instance, bytes found calibre 7.6 embedded-python: False Linux-6.8.0-106-generic-x86_64-with-glibc2.39 Linux ('64bit', 'ELF') ('Linux', '6.8.0-106-generic', '#106-Ubuntu SMP PREEMPT_DYNAMIC Fri Mar 6 07:58:08 UTC 2026') Python 3.12.3 Interface language: ru EXE path: /usr/bin/python3.12 Traceback (most recent call last): File "/usr/lib/calibre/calibre/gui2/__init__.py", line 755, in dispatch self.func(*args, **kwargs) File "/usr/lib/calibre/calibre/gui2/tweak_book/job.py", line 84, in job_done callback(job) File "/usr/lib/calibre/calibre/gui2/tweak_book/boss.py", line 381, in book_opened self.current_metadata = self.gui.current_metadata = container.mi ^^^^^^^^^^^^ File "/usr/lib/calibre/calibre/ebooks/oeb/polish/container.py", line 649, in mi mi = self.serialize_item(self.opf_name) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/usr/lib/calibre/calibre/ebooks/oeb/polish/container.py", line 1009, in serialize_item data = re.sub(br'(<[/]{0,1})opf:', r'\1', data) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/usr/lib/python3.12/re/__init__.py", line 186, in sub return _compile(pattern, flags).sub(repl, string, count) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ TypeError: sequence item 1: expected str instance, bytes found

Works fine on my end Thx stick! i had no idea this book exist

@adevaleev Works here. Not sure a file that large will work on my kobo reader, but it does in Calibre at least here (v9.1)

@adevaleev I had no idea the file was actually that big until I take a look at it again. Maybe it needs the latest ver Calibre for it to work, just in case.

Works fine for me v6. Something

@LykaRumi it's not just Calibre, Google Play Books also doesn't accept this file

For those having an issue with this file, Google Play Books has a cap of 100 Mb for the filesize of a Epub. What you need to do is convert the epub file to zip, extract all the files in the images folder and compress them so a smaller file size while keeping the same format. Afterwards, convert the file back to Epub and you should be able to upload it. I shrank mine down to 19 mb, from the 130 original and it works in calibre and google books.