💡 M.K. Eidem’s Imperial series currently ends with Stephanie's Challenge . Any mention of a fifth book likely refers to a different author or fan speculation for future releases. M K Eidem's Imperial books in order - Fantastic Fiction

As their romance develops, external threats loom. The Imperials and their allies must deal with the ongoing fallout of the war with the Ganglians, requiring Grim to balance his duty to protect his people with his overwhelming need to claim and protect his mate.

(2013) – Focuses on Cassandra Chamberlain, a brilliant scientist and one of the last survivors of Earth.