Here we have the first collection of Superman/Batman stories under the WORLD'S FINEST title. DC was offering up a lot of choice reprints during this period which helped acquaint all of us new readers with their characters and their histories.
Nearly all the ads are Bat-centric!
The letters page below references the previous collection from a year earlier which we didn't cover here because a) it actually appeared under the 80 PG. GIANT title rather than WORLD'S FINEST and b) we completely forgot that it existed until today! Sorry. You can see its cover below. It was the last separately numbered 80 PG. GIANT. After that, the specials were simply included within the regular series' numbering.