"The Widening Gyre" by Robert B. Parker (A Spenser Novel)

The adoring wife of a senatorial candidate has a smile as sweet as candy and dots her "i's" with little hearts. A blond beauty, she is the perfect mate for an ambitious politician, but she has a little problem with sex and drugs--a problem someone has managed to put on videotape.

The big boys figure a little blackmail will put her husband out of the race. Until Spenser hops on the candidate's bandwagon.

But getting back the tape of the lady's X-rated indiscretion is a nonstop express ride to trouble--trouble that is deep, wide and deadly.