If you are looking for this resource, it is available through several academic and retail platforms: Managerial Economics and Strategy, 4th edition - Pearson
A hacked PDF might save you $100 today, but a corrupted hard drive or a missed homework question because you had the wrong edition will cost you far more in stress and GPA points.
Save your "strategy" for your final exam, not for trying to outsmart a publisher's copyright lawyer.