The listing, You Don't Want to Know by Lisa Jackson has ended.
This is a used copy, one of Lisa Jacksons many suspense novels. It's about a woman named Ava Garrison whose toddler son goes missing during a Christmas party. Her son was never found and 2 years later some really strange things start happening. She sees her son on the dock and hears his cries during the night. Is she going crazy or is someone trying to make it seem that way so that they can gain her fortune?