I don't see why the machine couldn't/wouldn't store print-ready pages and it looks like it is capable of printing a 4-color cover. You may lose some quality in

I don't see why the machine couldn't/wouldn't store print-ready pages and it looks like it is capable of printing a 4-color cover. You may lose some quality in the actual materials and the book will likely be limited to one size but the fonts, kerning, page margins, etc. can all be controlled by the publisher.