It's official... iOS has been released and iPhone 6 goes on sale September 19, 2014. There are a LOT of people excited to use both of these new products (in fact, it's been estimated that nearly 5 million customers pre-ordered the iPhone 6 and 6 Plus in the first 24 hours).
There are a LOT of new features in iOS 8 as well as on the iPhone 6. Apple does a great job of making their products intuitive. Even with that in mind, sometimes, features aren't as intuitive as they can be, or in some cases, they can get lost or overlooked. To ensure that you are getting the most out of your new tools, Apple has released a free iBooks book called "iPhone User Guide".
The book is roughly 450 pages in length, and covers a wide range of topics including the usual built-in apps (Mail, Calendar, Memos, etc), Health apps and hardware features.
To ensure that you're getting the most out of your new iPhone 6 and iOS 8, download the iBooks book for free here.