Next ebook to convert to paperback at CreateSpace???

I am quite pleased with how The Ins and Outs of Becoming a Phone Sex Operator has been selling since it's been available in paperback.  I'd like to think it's because I've been a phone sex operator since 2005 and readers realize that I know what I'm talking about.  It might be because of my video:

It probably hasn't hurt that it's now on Askdavid.com as is my memoirs How I Became A Phone Sex Operator - My True Story soon to be followed by other of my books. 

Now the big question, which ebook should be next?  I write mainly erotica so which of my erotica ebooks should be next to convert into paperback at CreateSpace?

 Have a great weekend!!!

Elaine Shuel
www.elaineshuel.com
http://www.facebook.com/pages/Elaine-Shuels-Author-Page/144342862282258
http://www.smashwords.com/profile/view/ElaineShuel
http://www.barnesandnoble.com/s/elaine-shuel?keyword=elaine+shuel&store=allproducts
http://www.amazon.com/Elaine-Shuel/e/B004DKW2C2/ref=ntt_athr_dp_pel_1