The Echo Wife (by Sarah Gailey)

Speculative fiction with an outstanding premise: a brilliant scientist's husband has divorced her in order to marry her clone. Complications and twists ensue.

This is a page-turner.  Evelyn, our protagonist, is wildly unsympathetic and probably kind of a sociopath yet somehow you are rooting for her. (Revelations about about her childhood explain a lot.) If you think about it too hard the plot starts to unravel but if you don't, it's a wild and highly enjoyable ride.

Is the ending a little on the nose? Yes. Did I find it immensely satisfying anyway? Also yes!