Finished this book in a day. 
The premise seems absurd. When a Lauren’s husband goes into the attic a different husband appears and a different life to go with it. 
It starts suddenly and Lauren doesn’t know why. 
Because the set up is so out there, you can just put that whole thing aside and focus on what it means to be able to change your husband and life at will. How do you know when you’ve chosen correctly? What kind of person do you want to be? What would you do if you know all your actions could be wiped out.
Also, I’ll say that like in life, Lauren (a woman) has to make more drastic decisions and overt actions to get rid of some husbands. The burden is put on her to do some wild things to get some husbands to comply.

Meanwhile, Bohai, who is experiencing the same thing but as the husband, is allowed to make his own decision to leave whenever he wants to, without involving his significant other at all.