There are 2 books in the Nexus Space History Mysteries series. The newest book is Nexus Talks to People which came out in 2024.

1
Nexus Talks to Aliens

Book cover of Nexus Talks to Aliens
When Nexus catches the attention of the alien croc ambassador, his first space travel goes weirdly astray.

A backwoods Earth terraformer, young Nexus is awkward with people, good with creatures, at a time when the human worlds are bumping against the alien races who surround them.

He sets off to…
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2
Nexus Talks to People

Book cover of Nexus Talks to People
How can Nexus be the Oracle?

On a hardscrabble colony world, Nexus tracks a mysterious rat outbreak to a shy tortoise-like alien, who calls him Oracle.

If his addled visions amount to fortune-telling, Nexus can’t read the tea leaves. He foresees alien crocs ravaging Earth and enslaving humanity. Another vision…