A Practical Guide to Networking and Security in iOS 8
Glenn Fleishman just published a new book call A Practical Guide to Networking and Security in iOS 8. In the book, he covers everything you need to become a networking and security ninja on iOS. It includes Wi-Fi troubleshooting, personal hotspot, file transfer using AirDrop, VPNs, cellular data management, and much more. The book is $15 on Glenn's website, and it includes PDF, ePub, and MOBI file formats (DRM free). It's also available on the iBookstore.