Her Ex Knows the House: Quiet Street Protocol Book #2 (Paperback) (ISBN-13: 9798233668265)

Julia Vale ended the marriage. She did not cut off his access.
Her ex still knows the house, the school routine, the vendors, the side entry, and the hidden systems that make her life run. When he starts knowing things he should not know, Julia sees the truth: he was never just part of the home. He was built into it.
Her Ex Knows the House is a cold, escalating domestic suspense novel about control, proximity, and the danger of a man who refuses to stay gone.