H is for Homicide is the eighth in the Kinsey Millhone mystery series by Sue Grafton.

It was one of those occasions when I suddenly realised how happy I was. I was female, single, with money in my pocket . . . I had nobody to answer to and no ties to speak of. As usual I'd forgotten how surges of goodwill merely presage bad news.
After a three-week-long investigation, Kinsey couldn't wait to get home.
What she needed most was a few quiet days by herself – but two things happened to change all her plans. First she ran into a murder case. Then Kinsey met Bibianna Diaz, and before the night was over they were sharing a prison cell . . .