This report addresses common technical issues and solutions for digital books by Qazi Waqar Ahmad
: Many PDFs contain heavy watermarks from the original scanners that obscure the Urdu text or diagrams. OCR Errors
Qazi Waqar Ahmad passed away in 2015, but his estate (his children and publishers like Sang-e-Meel Publications ) still holds the copyright in Pakistan and India. Distributing a corrupted PDF hurts them AND gives you a bad experience.
Many of his books are widely sought after in PDF format for their rare and practical spiritual insights: