And So It Begins - The Supernatural Intelligence Network, #1

Jolene is the name she uses now - but she's had many names. Joan, Josephine, Johanna...yet she's always been just "Jo" to those she let get close. Name changes are part of one's existence when one is an intelligence operative - and when one is a vampire. One of the founding members of S. I. N. - the Supernatural Intelligence Network, Jo spends her days helping to keep supernaturals under the radar of the general public - among other things.
When a new man appears in her life, Jo has to decide if they'll stay enemies - or work together to keep the world safe from an old evil with a new face.