We're pleased to announce version 1.1 of troubleshooting guru Ted Landau's "Take Control of Your iPhone," which is updated for the iPhone 1.1.4 software and chock full of the latest advice for getting the most out of your iPhone, including information about syncing, how EDGE and Wi-Fi interoperate, the latest features in Maps, configuring Mail, hacking your iPhone, creating (or buying) ringtones, dealing with your battery, and much more. The ebook also has a strong problem-solving focus, so if your iPhone is behaving badly, you'll likely find a solution. (Existing owners of the ebook can upgrade for free by opening the PDF and - at the top right of page 1 - clicking Check for Updates.)

The ebook normally costs $15, but you can get it for $7.50 if you act quickly, because we're having a 50 percent-off sale on all ebooks through 29-Apr-08. Look for the iPhone ebook on the Lifestyle tab in our online catalog. When you click through from this post, the necessary coupon code will be applied automatically in the first screen of the cart. (Note that you can select multiple ebooks from the different tabs in the catalog's tabbed interface before clicking the Buy Selected Ebooks button to add them to your cart.)