Evolution: Making Sense of Life, the textbook Doug Emlen and I have just published, is now evolving into a full-blown app for the iPad. Once you get the free app, you can download some of the book’s chapters. We’ve now got the first eight chapters in the iTunes store. Chapters 1 (the introduction) and Chapter 8 (natural selection in the wild) are available for free. Chapters 2-7 can be purchased individually for between $4.99 and $9.99. The full book will be available December 1st, 2012; all 18 chapters will be priced at $80.