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There is nothing mad about these ebookmap files. They are just normal epub files following the standards.

You really should not try to fix any book, but implement the standard properly and then - once it is working - go for the broken books like "Die Zukunft ist schön!" you brought up earlier, which is a really broken epub file with loads of errors in it. It is a perfekt example on how to not create ebooks.

It even looks like someone edited the files from a template by hand, as there are tons of unused dummy entries and wrong formatted (speaking of xhtml) lines to make the stuff more human readable, which violates the file format.

Do not use those files as template to build code on. You will fail. Use at least some more trusty stuff like wikipedia to get it done.

Geit