Free Download Design Patterns Gamma

For a few years now I have been wanting to buy the object oriented book “Design Patterns: Elements of Reusable Object-Oriented Software” by Erich Gamma, Richard Helm, Ralph Johnson and John Vlissides. It’s one of those must have books for any software developer. It’s pretty expensive though. A new copy is almost $50. The Kindle version is even $27. Used copies also average around $25. I did a search on Google to see if there are any free copies out there.
Yes, there are!!!! Go to 4shared.com. It’s a file sharing site. First you have to download and install the software, which is free. Once installed, run the software and search for design patterns gamma. A list of available files comes up, select one and download. Apparently the hardcopy of the book is now available on cd, which is where the downloaded file came from. It seems to contain the full book, which I am now in the process of reading.
Thank you!