For your weekend reading pleasure, here are the most popular AppNewser headlines of the week, including our blog’s expansion, a Photoshop-spotting app and iPhone 5 shells.

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1. Twitter’s Co-founder Biz Stone To Pen Book
2. How to Convert EPub Books for use on Kindle
3. Was That Photoshopped? Soon You’ll Know
4. Free eBooks of the Week
5. What is an app?
6. How to Promote Your eBook for Free
7. Best iPad Stylus for Writers
8. iPhone 5 Shells Leaked
9. David Thorne Earned More With Self-Pub Book Than Traditional Publication
10. Free apps of the week