A quick search for the term reveals a massive demand. Thousands of learners daily flock to VK (a popular social network in Eastern Europe and Central Asia) hoping to find a free, “verified” PDF file.
Look at which words commonly go together (e.g., "do a favor," not "make a favor").
Whether you have the physical book or a PDF version, here is how to utilize the "Wordpower" system effectively:
Oxford University Press holds active copyrights. Downloading a full PDF of a commercial dictionary without payment is illegal in most jurisdictions. Universities have plagiarism checkers that now also look for unlicensed resource use.
Don't skip the pictures; they help encode meaning visually.