Decrypt Kno textbooks

Avg Bid (USD)
Project Budget (USD)
$30 - $250

Project Description:
I bought some books on Kno textbook store ( When downloaded it is PDF. But i cant open it by normal reader! Sample books can open normally with Adobe reader! They put a DRM on the PDF.
I want to decrypt the book because their reader is too bad! I can not view it in my mobile device. This is only for private use.

Skills required:
PHP, Software Architecture
About the employer:
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$ 35
in 1 days
$ 246
in 7 days