Wraith is a 380 page modern magics novel written by Phaedra Weldon and first published in 2007. It is most likely the beginning of a new urban fantasy series involving astral projection and detective work and featuring the witty first person narrator Zoe Martinique. Ace's summary reads as follows:
Zoe Martinique was just your average, single female, past 25, looking for love and/or exciting job opportunities. Until life handed her the dubious ability to travel outside of her body at will-which she turned into a career, hiring herself out as a literal spook. Industrial espionage, domestic surveillance, you name it-when she's traveling she can see but can't be seen... Then one night things get out of hand while she is out-of-body: Zoe witnesses a murder. What's worse, the killer is also a Traveler-and he most definitely not only sees her, but tries to pursue her. To save herself, Zoe must somehow guide the very handsome detective assigned to the case to the truth without revealing herself. And with the help of her semi-psychic mom, a pair of gay ghosts, and her best friend (a Goth techno witch), she also has to figure out exactly who-and what-the murderer is, before he finds her and puts an end to her traveling-permanently.
