r/buckrogers

In 1980, Ace Science Fiction launched a series of authorized sequels to Armageddon 2419 AD. I recently came across these online and was shocked because I've never heard of them before. In fact, there's shockingly little about them online, even if the first entry (Mordred) sold well enough to warrant three more entries. Armageddon 2419 AD is likely my favorite work of science fiction, do these novels adequately match the tone of the originals? Are they a throwback to the early days of Pulp Sci-fi novellas, or do they feel more like contemporary paperback sci-fi? They boldly advertised that they're "authorized" sequels (I assume licensed by Nowlan's estate). I wonder what, if any impact they made on readers in 1980 with the very first Star Trek and Star Wars novels hitting bookstore shelves around the same time. I recently read a ten-book series called "Rock Rogers in the 25th Century" that similarly used the original Armageddon 2419 AD as a starting point to tell a very interesting story about guerilla warfare. Has anybody here read these?