For a chrisitian ceremony, I love the idea of getting a personalized a Bible as the guest book. I have so many friends who have gotten married and never really look at their guest book again. My fiancé and I get married in a weeek and we found this bible that comes with a note saying to highlight your favorite bible verses and it has space inside for friends and family to write messages. We are thrilled to have a guestbook that is faith based and we can keep and use as our family bible to read together and with our kids one day! the one we purchased is really pretty leather and comes personalized with our new names and wedding date too!!!
https://www.etsy.com/listing/485641816