Amazon Kindle users will be happy to hear that the iOS client for the e-book service received a nice little update this morning. The release, which brings the app to version 4.2, brings about two substantial new features: Table of Contents and X-Ray Smart Look-Up, and other improvements.
The first new feature is fairly self-explanatory—customers can now access a book's table of contents from within the app—but the second is a bit more subtle. X-Ray Smart Look-Up will allow users to take advantage of Amazon's quick-referencing tool without leaving their current page...