The Valkyrie Stratagem (House Adamant, #3)

A promise of victory
A long journey home
The price of alliances

Lorraine Adamant, Pentarch of the Kingdom of Adamant, has crossed hundreds of light-years to find the allies needed to overthrow her uncle, the man who killed her family and stole her mother’s throne.

The allies she found aren’t the allies she wanted, but three powerful sentient battlecruisers and a skilled covert operator from the United Worlds’ seedy underbelly are a force to be reckoned with. Between the firepower of the Valkyrie-class battlecruisers, the minds of the Synthetic Intelligences that command them, and the skills of the spy who loves her, Lorraine has a real chance of saving her Kingdom.

If she can get them all home.