I was asked to make a wedding card which included the couples names on the front - but when I suggested a pop-up book card with the names inside, that was happily accepted.
The tutorial is HERE, and I followed it exactly. Took me a while to find suitable DP to use inside, this piece is one I've had for years.
I used Gorgeous Grunge and Brilliance Platinum to stamp on the "edges" of the book to look like pages, masking off the rest of the card. The panels were computer generated, and I stamped the hearts on afterwards. Font is French Script.