This is the easiest and simplest way I know of to force myself to read:
Repeatedly type in wrong passcodes until the device locks you out. iOS will lock you out for 1, 5, 15, and 60 minutes if you continue entering incorrect codes. The lockout likely keeps increasing, but I did not care to find out. You can’t bypass this (it is brute force protection), which is incredibly useful when you need to stop surfing the web. On the plus side, my book is finished now.