Step 1 Download the free Gunks app.
Download for Apple
Download for Android
Step 2 Open the app and enter your email.
Step 3 Open your email to get the code, then re-open the app to and enter the code.
Step 4 Click Buy at the bottom of the screen.
Step 5 Select the guidebook(s) you would like to purchase, and enter your credit card #.
Step 6 Click Refresh and then Download (you may wish to be connected to WiFi).