Apple Books: Pre-ordered book not readable because of Sample

Hey there,

i pre-ordered a Book on Apple Books. Recently a sample became available which I downloaded. Today the book was released - and now the full book is not readable. I get the full table of contents, but only the 25 pages of the sample - weirdly enough the content is different from the actual sample, as each page is a chapter of the book.

I have deleted the download, restarted my phone, redownloaded - yet the problem persists. What can I try next? Or do I have to assume the book file itself is corrupted?