I'll soon have full set of Tarzans printed in 30s & 40s amongst other things. My main issue with expanding personal library is that it takes a lot more time to read than buy a book.
My own set of Tarzan books is newer than that. But I did manage to get them all (and have read most of them).
There was just one small problem with the set I had... Tarzan is one of the barbarian adventure series my grandparents approved of, and when my grandmother happened on a book at the farmers' market that had a similar style of artwork on the front cover, she bought it for me - not paying attention to the title but assuming it was another Tarzan book.
Turns out she'd bought me Nomads of Gor.
Tevye the Milkman, by Sholem Aleichem.
One could almost make a musical of that.
I'm still working on my stack of Highlander novels, but have also started reading
Uranus, by Ben Bova.
JFCOASB, I have no idea how that series went downhill so badly. The first ones were good science-centric space opera, and the 4-novel Asteroid Wars arc is classic space opera with one of the best characters Bova ever created (Lars Fuchs).
Venus is the stuff of nightmares as a ship's crew tries to survive the descent/ascent through Venus' atmosphere as little hungry extremophiles eat away at the ship.
Mercury is Bova's homage to
The Count of Monte Cristo and I love the Jupiter/Leviathans of Jupiter novels (shame there wasn't a third one; it seemed obvious that there should be a way for humans to figure out how to communicate with the Leviathans).
The Saturn/Titan novels aren't bad; there's still enough science in them, plus there are still a couple of characters around from the Asteroid Wars arc.
And then they got boring. The ones involving meeting the aliens are a snoozefest, and now I'm reading a book in which part of the plot involves an astronomer who goes all the way out to a habitat orbiting Uranus to find out if there's life there... and the major part of the plot is that the guy who bankrolled the habitat is actually a drug lord who somehow manufactures and sells his stuff from the habitat, but not to anyone who lives there. WTH?