I like a lot of true crime books and also crime/thriller books in general. I love anything by Jeffery Deaver, Patricia Cornwall and Karin Slaughter but one of my favourite books has to be The Death Trilogy by Terry Pratchett.
If you like Patricia Cornwell and Karin Slaughter you should check out Kathy Reichs, she's a forensic anthropologist that teachs in North Carolina, and is a staff member for the Quebec ME's office, and her main character Temperance Brennan is the same, great books. Also check out Jefferson Bass, one of the writing duo is William Bass the creator of the Body Farm in Tennessee, and their main character is based on his profession.