The best stories of the week from across the web on e-books and self-publishing

1. Justice Department confirms e-book pricing investigation (Digital Trends)

2. Mathew Ingram: What purpose do book publishers serve? (GigaOM)

3. Which online retailers do the best job of helping sell your e-books? (Online Journalism Review)

4. Amazon to publish children’s e-books for Kindle Fire (paidContent)

5. Amazon expands Kindle owners’ lending library to self-published authors (paidContent)

6. Survey shows buyers shop for books in stores but buy online (New York Times)

7. “Price Check” app from Amazon offers buyers 5% off to first scan item in store, then buy on Amazon (Gawker)