You can read a downloaded book using:

1. PDF Readers: Adobe Acrobat Reader, Foxit Reader.

2. ePub Readers: Google Play Books, Apple Books, Calibre.

3. Kindle App: For .mobi files.

4. Offline Reading Apps: Moon+ Reader, FBReader.

5. Web Browsers: Chrome or Firefox (if compatible).

6. Careers360 Platform: If downloaded from there, check for in-app or web-based reading options.