Apple cracks down on in-app content purchases; Zynga slapped with countersuit over game copying charges;

> Google Books exits App Store as Apple cracks down on in-app purchases.

> Zynga slapped with countersuit over game copying allegations.

> Google says it rejected $100M royalty deal to use Java in Android.

> Inneractive: iOS ad click-through rates double up Android.

And finally... British lab produces more than 150 human-animal hybrid embryos.