Question [Q] letters not appearing in ebook readers??

i recently downloaded Bhagavad gita.epub book and when i opened in aldiko it appears(boxes) as show in attachment, i tried other ebook readers and they appeared similar or with some spaces, the original characters where never shown in my device.

How to make those characters appear??

i have also provided a screen shot from my pc indicating how the boxes should appear.

help!!
Attached Thumbnails
Click image for larger version

Name:	Capture.PNG
Views:	14
Size:	107.1 KB
ID:	2594728   Click image for larger version

Name:	Screenshot_2014-02-23-01-59-37.png
Views:	11
Size:	80.4 KB
ID:	2594729  
Hit *Thanks* if i have helped

Device: Xperia mini [Smultron]
Bootloader: Unlocked