ChatGPT Classifies Elbert

Elbert needs a somewhat different KDP strategy from Maroli Tango. Its strongest commercial identity is historical/secret-history science fiction that grows into interplanetary political adventure.

The opening is firmly planted in 1928 South Dakota, with Elbert an 83-year-old physician and Civil War veteran. The initiating revelation is that extraterrestrial Anye have been quietly living and vacationing on Earth for millennia, hidden behind Sasquatch/Bigfoot/Wendigo folklore. By Act 2 the family is traveling to Jivada; by later acts Elbert is involved in assassination attempts, economic conspiracy, political rebellion, spacecraft, and interplanetary government. And the age-reversal premise pays off explicitly: by 1934, eighty-nine-year-old Elbert appears to be about forty.

My recommended Amazon.com KDP categories

Priority	Category	Reason
1	Fiction > Science Fiction > Alien Contact	This is the clearest promise. Elbert personally discovers that Earth’s folklore conceals an extraterrestrial civilization, and contact with that civilization changes his entire life.
2	Fiction > Alternative History	Elbert is essentially a secret history of Earth: familiar history remains recognizable, but an enormous extraterrestrial civilization has been operating behind it.
3	Fiction > Science Fiction > Space Opera	After the historical opening, the story expands to Jivada, space travel, interplanetary institutions, political factions, conspiracies and armed conflict.

I prefer Space Opera over ordinary Historical Fiction for the third slot because someone buying Elbert primarily as a conventional 1920s historical novel would get quite a surprise. The book’s historical setting is genuine, but its ultimate reader promise is science fiction.

If KDP’s current selector doesn’t offer one of those exact choices for a particular format, my first substitute would be Fiction > Historical > 20th Century or Fiction > Historical > General. Amazon currently allows three categories and notes that available categories vary by marketplace and format.

The seven keyword fields I would use

KDP keyword field	Recommended phrase
1	1920s secret history
2	hidden alien civilization
3	Civil War veteran
4	fountain of youth
5	interplanetary political intrigue
6	multigenerational family saga
7	ancient extraterrestrial history

Those deliberately cover setting, protagonist, speculative hook, plot, emotional structure, and worldbuilding rather than repeating the category names. Amazon specifically recommends short phrases, generally two or three words, and suggests using setting, character type, plot themes and tone while avoiding redundant metadata and misleading terms.

There are three tempting terms I would not put in the initial seven. “Historical science fiction” accurately describes the book, but your categories already communicate both halves. “First contact” is excellent reader language, but Alien Contact should already push Amazon toward its First Contact browse placement; current Amazon category data associates the KDP Alien Contact classification strongly with the First Contact shelf. And “space opera” would merely repeat category #3.

One keyword I would keep in reserve for experimentation is “Sasquatch science fiction.” That sounds eccentric until one reads the book—but in Elbert it is literally accurate, and the opening’s revelation that Bigfoot/Sasquatch traditions are sightings of Anye is memorable enough to function as a niche discovery hook. Another reserve term is “age reversal”, which may outperform fountain of youth with harder-SF readers.

My final KDP package, therefore, would be:

Alien Contact + Alternative History + Space Opera

with

1920s secret history / hidden alien civilization / Civil War veteran / fountain of youth / interplanetary political intrigue / multigenerational family saga / ancient extraterrestrial history.

I think this does a particularly good job of advertising what makes Elbert unusual: it isn’t merely “aliens in 1928.” It’s an old Civil War doctor discovering that his family, human history, aging, religion, politics and the night sky are all considerably larger than he thought.