Bob possesses Mister

"Not so fast," I said. "She might not have it with her. If she's in on this with the Nightmare, then she could have dumped it once she had it away from me. That's where you come in. "
"Me?" Bob squeaked.
"Yes. You're going to head out, hit the streets, and talk to all of your contacts, see if we can get to her before sundown. We've only got a couple of hours. "
"Harry," Bob pointed out, "the sun's up. I'm exhausted. I can't just flit around like some kinda dew-drop fairy. "
"Take Mister," I said. "He doesn't mind you riding around. And he could use the exercise. Just don't get him killed. "
"Hooboy," Bob said. "Once more into the breech, dear friends, eh? Harry, don't quit your job to become a motivational speaker. I have your permission to come out?"
"Yep," I said, "for the purposes of this mission only. And don't waste time prowling around in women's locker rooms again. "
I put out the candles and the heater and started up the stepladder. Bob followed, drifting out of the eye sockets of the skull as a glowing, candleflame-colored cloud, and flowed up the steps past me. The cloud glided over to where Mister dozed in the warm spot near the mostly dead fire, and seeped in through the cat's grey fur. Mister sat up and blinked his yellow-green eyes at me, stretched his back, and flicked his stump of a tail back and forth before letting out a reproachful meow.
I scowled at Mister and Bob, shrugging into my duster, gathering up my blasting rod and my exorcism bag, an old black doctor's case full of stuff. "Come on, guys," I said. "We're on the trail. We have the advantage. What could possibly go wrong?"


Grave Peril Chapter 15, Page 142-143