Limited Death Guard Codex

I purchased this from a thrift store a year ago because I love the Death Guard and thought it looked cool. Today I finally dug through it a bit and looked it up on Google and found out it was a really limited print run item (only 1,250 it seems). I can’t find much info on it so does anyone know more about it?

Also, more importantly, is it still useable in the tabletop if I wanted to start playing? I think it’s 8th edition.