My son is pageboy and is obsessed with the 'pages' job that he has to do...

In other circumstances, I would have probably had him carry a bible and give it to the couple but the couple are not particularly religious (although it is a church wedding).
I wondered if anyone had a suggestion for a book that DS could give to them - either a children's book with a strong message of 'love' of 'marriage' or perhaps a book of poems or something that isn't too poncy?
Thanks!