The Murder of Laci Peterson by Cliff Linedecker

This book was published in 2003, so the news is a little old.

Laci Peterson was pregnant with her baby boy, Conner. She had no clue that her husband was having an affair with someone else. Laci disappears on Christmas Eve and much money and time is spent looking for her and her unborn son. 

Scott Peterson should carry this guilt until the day he dies.

The author does not have a website.