2009 Book Bag Trends. Hottest styles of book bag trends for 2009. This Fall one of the hottest accessories is book bags. Many are actually carrying their book bags around even when school isn't in session. Both guys and girls are following this trend. Look below to see some of the hot looks in book bag trends for 2009.Star DesignsCheckered StylesTote BagsMessenger BagsPlaidOversized BagsGrunge StyleDesigner BrandsCanvas Bags















