Iron Widow

This gets a 4 ⭐ Loved the character interactions, loved Wu Zetian!

But the last revelation didn't hit as hard as it should have, the epilogue had more action than the last act, and it took me 3 days to get through part 4.

— Spoiler Warning (for 3 different books) —

* The major revelation in the epilogue is literally the major revelation from (avert your eyes