![O'Reilly's Windows® Phone 8 Development Internals [eBook] US $10](https://files.ozbargain.com.au/n/72/83472.jpg?h=eb0861fd)
This is a newly released book, with a starting price of US$10, rising to its full US$50 price by mid-February.
The writing of this eBook is not yet finished, but if you buy it this week, for US$10, you'll receive a number of (electronic) updates up to, and including, the final release.