What is the setting in the novel, Thirst No. 1: The Last Vampire, Black Blood, Red Dice?

The novel is set primarily in Oregon, Los Angeles and Las Vegas. The novel seems to be in the 21st century, but also touches on ancient stories and things that occurred in historical times. The main characters are involved in the investigation of Alisa's Perne's background and the mysterious attacks on humans in Los Angeles, where they bodies are drained of blood.