[Blindtlk] book signings

[Julie J.]

Hello all!

I am thinking/hoping to attend a book signing next week.   I have never attended anything like this before.  My understanding is that generally people bring or purchase print copies of the authors books for him/her to sign.  I only have audio books of the download variety, so there isn't even a CD jacket.   

What is the appropriate etiquette in this sort of situation?  
Purchase a print book?
Have the author sign something else?
Ask the author to record an audio "autograph"?
Something else?

Thanks in advance!
Julie