There’s a new iPad-only app from Sports Illustrated that traces the history of American football. The Football Book contains the complete contents of the coffee-table book by the same name. You’ll read about “the dynasties and the dominating players, the crucial plays and classic games, the personalities and performances that propelled the NFL during SI’s first 50 years of publication, from a marginal, ragtag league to the biggest game in town.” This ebook version enhances the book by offering a clickable table of contents, a filmstrip navigation tool, and audio commentary by Neil Leifer. The Sports Illustrated The Football Book is $14.99 in the iTunes store.