I think I would go for a Dickin's first edition, either OLIVER TWIST or A CHRISTMAS CAROL. Since I have played both Fagin and Scrooge, twice each, it would be a nice memento. I have never really understood why the musical, OLIVER, is so popular at Christmas; so I guess I would opt for A CHRISTMAS CAROL
Other choice for a first edition would be A NIGHT TO REMEMBER, by Walter Lord.