The computer book publisher APRESS has begun offering one of its titles each day as a PDF for $10. Often these are crusty old works, sometimes even for old versions of software, but today's choice looks useful to anyone who programs for a living but does not have the benefit of working in an environment with a formal security process.

APRESS.COM : Foundations of Security: What Every Programmer Needs to Know.

The $10 price ends at 11:59pm Pacific time today. You can check the offer of the day here: