Great deal! I bought that set new years ago in the mid 90's. I don't remember there being a slipcover for the book. I'll try to check mine out later and see.
I never had any of the OT prior to the 93 Definitive version. So, I keep looking for those when I visit HPBooks too. On a side note, I did see the first 3 Raiders/Indiana Jones films on LD at the HPB in Mesquite, TX last week. But I already have those.