Search for "Hal Leonard Real Book" in the App Store. They have an official app where you can purchase individual songs or entire volumes (including Pop Book Vol. 2) as in-app purchases. The app transposes the key for you and plays a backing MIDI track. This is superior to a static PDF.
Here are some frequently asked questions about "i--- The Real Pop Book - Volume 2 Pdf": i--- The Real Pop Book - Volume 2 Pdf