The House Across the Lake is a 2022 thriller novel by American author Todd Ritter, writing under the pen name Riley Sager.

[1] The plot concerns a woman who investigates the disappearance and possible murder of her glamorous neighbor at a Vermont lake resort.

Reviewers favorably compared the book to the classic film Rear Window and a movie adaptation is planned.

Alcoholic actress Casey Fletcher has retreated to her family's cabin at Lake Greene, Vermont in order to hide from the press.

While sharing an expensive bottle of wine, Katherine reveals to Casey that Tom's startup is struggling for lack of capital and that her own money is keeping the two of them afloat.

Social media posts suggest she has returned to Manhattan, but Casey discovers these have been fabricated, leading her to think that Tom may have killed his wife.

Wilma dismisses their suspicions until Casey recovers a broken piece of the wineglass Katherine drank from the night before she disappeared.

Wilma reveals that the Royces may be connected to an active investigation: three young girls who disappeared from the surrounding area and are now presumed dead, victims of a serial killer.