So, if you haven't read anything from
Christopher Moore, you should.
The rest is for those who have read Island of the Sequined Love Nun, Lamb, and The Stupidest Angel. The quote is from an interveiw about The Stupidest Angel.
"Raziel the angel came back [from Lamb] because I wanted to do the whole angel-Christmas-wish fulfillment thing, and I wanted to screw it up. Raziel is not the brightest halo in the host. .... My readers kept writing and saying, "Bring Roberto the fruit bat back." It's not that easy to write a chatty fruit bat into any story, so I had to bring back Tucker Case, too, the pilot who belongs to Roberto."
(click to read the whole article) I love that the piolot belongs to the bat. Love love love.