What the hell is an ozalid? THIS is an ozalid:

An ozalid is a digitally produced paper proof that gets booked together to show how a book or magazine will be assembled and how pages will look side by side when the final product is printed. I have one for "BPM" in my hands, and I've just gone over it with a microscopic comb to look for correct spelling, dropped letters, missing scans, moved images, color problems and anything else that could go wrong when you send electronic files to the other side of the Earth.

Good news; no problems found. Everything made it intact. I am sending back my approval to my Malaysian printer, to give them the go-ahead to commence the printing of the book.
Next step; I get to see the unbound pages of the printed book. Cross your fingers!