What is a good theme statement for Alexa Donne’s book, “Brightly Burning”?

Extra info to help:

Alexa Donne's lush and enthralling reimagining of the classic Jane Eyre, set among the stars, will seduce and beguile you.

Stella Ainsley leaves poverty behind when she quits her engineering job aboard the Stalwart to become a governess on a private ship. On the Rochester, there's no water ration, more books than one person could devour in a lifetime, and an AI who seems more friend than robot.

But no one warned Stella that the ship seems to be haunted, nor that it may be involved in a conspiracy that could topple the entire interstellar fleet. Surrounded by mysteries, Stella finds her equal in the brooding but kind, nineteen-year-old Captain Hugo. When several attempts on his life spark more questions than answers, and the beautiful Bianca Ingram appears at Hugo's request, his unpredictable behavior causes Stella's suspicions to mount. Without knowing who to trust, Stella must decide whether to follow her head or her heart.

op: object of preposition