Widow's walk

When fifty-one-year-old Nathan Smith, a once confirmed bachelor, is found in his bed with a hole in his head made by a .38-caliber slug, it's hard not to imagine Nathan's young bride as the one with her finger on the trigger. Even her lawyer thinks she's guilty. But given that Mary Smith is entitled to the best defense she can afford

and thanks to Nathan's millions, she can afford plenty

Spenser hires on to investigate Mary's bonafides.