Help me internet hive-mind

When I was a kid (early 1970s), Toys R Us sold a series of books that were somewhat over-sized, say 8 x 14, that annotated odd words or old-fashioned items. The books were unabridged classics, but the annotations were really useful for vocabulary improvement. The problem is that I can't remember the name of the publisher. Does anyone have a clue what I'm talking about? I'd love to find some of these, even if I have to use Alibris, but I need the publisher to do so. I'm pretty certain it's not "Illustrated Classics" because the "look inside" feature at Amazon didn't have the spacing and annotations I remember.