Running Hot by Jayne Ann Krentz

This book takes an interesting look at physic energy power levels and aura reading.  There is romance mixed in with mystery.  I liked the main characters almost instantly - the good ones, not the evil ones.  It's a long book, but the story line keeps moving.  I would recommend this book for a summer read.

Librarian Grace Renquist and ex-cop-turned-bartender Luther Malone, both members of the centuries-old Arcane Society, join forces when the psychic investigative agency Jones & Jones hires Grace, with Luther as her bodyguard, to find a killer in Hawaii. Luther quickly realizes Grace is not your normal paranormal, but their hot romance is put (briefly) on hold as they learn that Nightshade, drug-fueled supernatural baddies, are after the same murderer—as is the lethal psychic hunter La Sirène, an opera diva with a killer voice.