The ailing stock market has made protecting market assets a difficult challenge, to say the least.

But along with the market downturn has come a bevy of new books devoted to managing risk and protecting investments. If you’re looking for a few tips on shoring up your portfolio, you might find some useful information in one of these titles:

• “Investing in a Post-Enron World,” by Paul Sorion, McGraw-Hill, 2003 ($14.95).

It covers how to learn from the Enron debacle and determine a stock’s true value.

• “Safer Investing in Volatile Markets,” by Carolann Doherty Brown, Dearborn Pub., 2002 ($18.95).

The book provides a dozen strategies, from guaranteeing investments to risk trade-offs and asset allocation.

• “25 Stupid Mistakes You Don’t Want to Make in the Stock Market,” by David E. Rye, Contemporary Books, 2002 ($16.95).

The book features step-by-step advice on how to learn from and avoid investing mistakes.