Sites offering "cracked" files are often fronts for trojans and ransomware that can compromise your computer.
If you are looking for a "cracked" or PDF version, you are likely looking for these specific modules:
Supporting authors like R.B. Patel ensures that they can continue to update the material for new generations of students. Better Alternatives for Students
Instead of searching for risky "cracked" files, consider these options:
Most CS departments carry multiple copies of this text.