It really was. And just the fact that it was default-installed was a main perk: I could rely on it being on, say, a work PC, where I can't install software for personal use.
It was the nicest one I've used on any platform. Now I read epubs on Apple books and I come away a little frustrated every time I use it (especially when I copy and paste)
> especially when I copy and paste
You can make copy and paste work normally in Apple Books with the solutions on https://apple.stackexchange.com/q/137047 ‘Don't want iBooks to always paste the “Excerpt From” of what I have copied’.
The PDF reader too. Wish they repackaged it as a standalone app.