
a small book (160 pages) about the writer whom takes a stone from Vienna to the Black Sea. According to google it takes 10 days to walk there (nonstop walking that is)
I would guess this dude wrote the book for his own reference, as it seems google doesn't really know what I am talking about
What is this book about?
Amazon has a brief but fitting review:

When you find this book: BUY (or borrow) & READ!