In the meantime, I've found the book on Play-Asia. Here are some pics of it:
The book is larger than expected, and the illustrations are indeed very rich. According to the cover, there are some 296 pages in it, so I'm impatient to get back to working on it, now that I don't depend on the scans anymore. From now on, translations will take less, because the text is crystal clear in the book itself. Lovely!