More or less in disguise. American Gods, Iron Druid, etc.
Got more?
The Homeward Bounders. Percy Jackson
YA, but good YA.
You’d never guess what it’s about by the title, but you just described the new, and mediocre, novel The Immortals.
Are you only counting deities, or are other essentially-immortal beings qualifying? There’s the ginormous vampire genre. Then there’s Octavia Butler’s fanfreakintastic Wild Seed, my favorite work by an excellent author. If reincarnation works, there’s The First Fifteen Lives of Harry August, a very fun sort-of-time-travel book with characters who are very nearly immortal.
“This Immortal” by Zelazny
Various people in the Sandman graphic novels.
The Lazarus Long book(s?) by Heinlein.
No, not vampires* but the first few books of the Casca series, by Sadler, were fun and would count.
- besides, you can kill a vampire. I should know, my Great grandfather did.
Screw wandering, I only like books about immortals that are heavily invested in manufacturing and agriculture.
Added the first, I have read the Percy Jackson series. Yes, they were quite good. The spin off, the Egypt series was very meh.
There were all the **Dancers At The End Of Time **stories by Michael Moorcock.
TCMF-2L
Yes, I read that series long ago. I was thinking more of named Immortals, those from Earths mythology .
If you’re willing to accept manga there is “Ajin: Demi-human” which is also an anime.
- Gulliver’s Travels*
Changer by Jane Lindskold and its sequel *Changer’s Daughter. *The main protagonist is so old that he was one of the first living things to leave the ocean. And both novels revolve around a society of immortals, many of which are the basis for all sorts of myths; Arthur Pendragon is a significant character for example.
The “Watch” series by Sergei Lukyanenko.
The Golem and the Jinni by Helene Wecker
added to list.
From the SF classic shelf.
And the TV movie based on the first segment of said book.
Heck, darned near anything by Zelazny.
Camouflage by Joe Haldeman, about two shape-shifting aliens wandering through human society for eons, is excellent.
A number of vampire books touch on questions of immortality and disguise. George R.R. Martin’s Fevre Dream, about vampires along the antebellum Mississippi River, is one of my favorites.
The Immortal series by Gene Doucette. Fun series about an oversexed drunkard who’s been around since before the spoken word. He goes by Adam, but his original name was Urr.