So instead of picking just ONE Harry Potter book to represent your love of the series, make a complete seven-book set of adorable Potter-inspired DIY cover ornaments that will make your tree look magical.
Creating a Harry Potter spellbook is a fantastic idea! One could be made using yellowing parchment and old-seeming binding, and placed on a stand during a party. Or, it could be a prize for a difficult Harry Potter-related game. Perhaps they can be organized based on function, (ex. attack, defense, etc.). This could be one website to help speed the process: http://harrypotterspells.net/ -SvH