Never Coming Home by Hannah Mary McKinnon
His bride planned a wedding and a life together while Lucas has been planning the end of the marriage.

Never Coming Home by Hannah Mary McKinnon
Every detail planned to perfection. Burner phones, a laptop only for this purpose, a locker at the bus station. No detail missed. Even setting an alarm to make himself look tired, unable to sleep, and worried about his missing wife, to look like the poor upset husband. Ha! If only people really knew. But they never will. Lucas has planned Michelle's disappearance to every minute detail.
Now he is helping care for her mother, Nora. Dying of cancer and adding to his plan perfectly. All of the money will go to him soon. He just has to be patient a while longer.
But when odd things start to happen, Lucas begins to think back through every step. He knows nothing can be traced to him. Unless...
Then, someone from his past shows up who can ruin everything, so another plan forms.
Lucas is always two steps ahead of everyone. He has to be. His fathers life depends on it.
"Highly anticipated book! Great author! Highly recommended by Books and Pens on Green Gables!"