Here is the reading order list for Charlaine Harris DEAD series about Sookie Stackhouse and vampires:

1. DEAD UNTIL DARK
2. LIVING DEAD IN DALLAS
3. CLUB DEAD
4. DEAD TO THE WORLD
5. DEAD AS A DOORNAIL
6. DEFINITELY DEAD
7. ALL TOGETHER DEAD
8. DEAD TO WORSE
9. DEAD AND GONE
10. CRUEL AND UNUSUAL

Also book by Charlaine Harris and Toni L P Kelner --MANY BLOODY RETURNS