PDF Reader is one of the best reading tools. It can help you to easily manage and open all the ebooks on your phone.
Supports ebook formats: PDF, DjVU, XPS (OpenXPS), FictionBook (fb2 and fb2.zip), Comics Book formats (cbr and cbz), EPUB, EPUB 3, MOBI, AZW, AZW3 and LibreOffice, OpenOffice (ODT, RTF)

Key features of PDF Reader:
* Pages or scroll view. Page flipping animation.
* Text to Speech (TTS) support in PDF
* Table of contents, bookmarks, text search.
* Bookmarks on text fragments (comments or corrections) - useful for proof reading.
* Export of bookmarks to text file.
* Built-in file browser, quick recent books access.
* Online catalogs (OPDS) support.
* Night reading mode
* Hyphenation dictionaries;
* Most complete FB2 format support: styles, tables, footnotes.
* Additional fonts support (place .ttf to /sdcard/fonts/)
* Support for Chinese, Japanese, Korean languages; autodetection of TXT file encoding (GBK, Shift_JIS, BIG5, EUC_KR).
* Day and night profiles (two sets of colors, background, backlight levels).
* Brightness adjustments by flick on left edge of the screen.
* Background texture (stretched or tiled) or solid color.
* Paperbook-like page turning animation or "sliding page" animation.
* Dictionary support with PDF books (ColorDict, GoldenDict, Fora Dictionary, Aard Dictionary).
* Customizable tap zone and key actions.
* Autoscroll (automatic page flipping) - start using menu/goto/autoscroll or assign action Autoscroll on key or tap zone; Change speed using volume keys or bottom-right and bottom-left tap zones; stop - tap any other tap zone or key.
* Can read books from zip archives.
* Automatic reformatting of .txt files (autodetect headings etc.)
* Styles can be customized in a wide range using external CSS.
* Select text using double tap (optional).

Disclaimer：
This app is base on Librera code and licensed under the GNU General Public License.

// Option A //

To download PDF Reader - PDF Viewer mod from HappyMod.com.
You need enable the option "Unknown Sources".
1. Click on the above link to download PDF Reader - PDF Viewer mod APK.
2. Save the file in your device Downloads folder.
3. Now tap on Install and wait for the installation to finish.
4. Once it is done, open the game and start playing it right away.

// Option B //

To download PDF Reader - PDF Viewer from HappyMod APP, you can follow this:
1. Open your browser and download the HappyMod APK file from HappyMod.com - the only official website of HappyMod.
2. Open Android Settings and go into Privacy or Security.
3. Tap the option to Allow Unknown Sources and enable it.
4. Go to your Android downloads and tap the APK file.
5. Follow the directions on the screen to install it.
6. Search PDF Reader - PDF Viewer in HappyMod App.