The app supports a huge list of formats (fb2, txt, doc, rtf, html, chm, tcr, pdb, pml, epub and mobi), it’s easy to use and it looks cool. First, I like the default background – when you look at it, your eyes don’t hurt and it seems you’re reading a real book (you can change the background’s color and textures, and even put your own background, but the default one seems to be the best for me), you can almost feel that paper smell, too :) Second, you can easily jump to the needed page, search for some text, bookmark the pages… Very useful, an ideal app for reading fiction.
You can download books with the help of FBReader or download them manually and read them in the app. The book reader already includes some famous English, French, Chinese, Russian and Polish libraries, too.
Some people are interested in getting different 
Find the app you want to install – either go to one of the categories (Applications, Games) or use the Search button.
Enter the Android Market and select My Apps (have a look at the screenshot above) – you’ll see the list of apps installed on your smartphone.
Previous infected apps could access your smartphone’s call log and see whom you called and who called you, but none could get access to your conversations. And this new Trojan is really scary – it records your conversations in “.amr” format and can even send them to the computer of its maker, and you won’t even know about it.
Lookout, a Mobile security company, says there are about 30,000-120,000 phones affected with those dangerous apps. “This weekend, multiple applications available in the official Android Market were found to contain malware that can compromise a significant amount of personal data. Likely created by the same developers who brought DroidDream to market back in March, more than 25 applications were found to be infected with a stripped down version of DroidDream we’re calling ‘Droid Dream Light’ (DDLight),” How to Install Non-market Android Apps
Now that you are continuously surfing over pages of Android Market with hundreds of apps to download, one day you may wonder what next, what are the other resources to explore. This article contains detailed instructions as how to find and install third party compatible apps.
Step 1. Research and locate other compatible app resource
The easiest way for this step is just to do a search on Google, but sometimes you may just discover a compatible app by accident. Forums also are a good place to read about other users’ findings and comments. Other websites like Slide Android Market and AndAppStore also feature non-market apps.
Step 2. Check to see of the app is in compatible format.
You have to make sure in this step that the app you are going to download is in the right format. The correct format to work with your Android handset is the APK; that is the file should have the APK extension to work.
Step 3. Start the download the compatible file to the smartphone.
As a rule, the file will be downloaded to the phone’s default download folder. But the location is not important if you can find the file later.
Step 4. Customize your Android phone to a non-Market installation option.
You will have to go to Menu, Settings and then press Applications. From the latter, select the Unknown Sources option.
Step 5. Get the Android file manager and install it.
You can also use Android SDK for APK file installation. But most users usually opt for a free file manager app. The most popular is the free Apps Installer available from Android Market, but of course there are other with similar function.
Step 6. Installing the new software.
Launch the file manager and then select install. Browse to the downloaded APK file and select it. Further follow on screen instructions to finish the installation.
Step 7. Make Android secure again.
Go to Menu, Settings and Application and then uncheck the Unknown Source box.
We hope with this simple instructions, you can find tons of useful apps to every taste and install them without any headache
guides for installing offical Android Market and other Google apps
