Prentice-Hall International-UK made a mistake in the online offer made to TidBITS readers for my book. They have been offering 20 percent off 18.50 pounds, when in fact the base price they should have been charging was 27.50 pounds, which is now in effect. Sorry for the mistake, and if you lucked out on the lower price, congratulations.
Set Password Activation Time in Snow Leopard
In Snow Leopard, you can now set an amount of time after your Mac goes to sleep or engages the screen saver before it requires a password to log back on. In Leopard, the option was simply to require the password or not. Choose among several increments, between 5 seconds and 4 hours, from System Preferences > Security.