Rental properties in todays market?

With today's present housing market and values is buying rental properties even a good idea? Are there any recent books out there that would be a good read for a possible first timer that explain the baby steps and important info that I might need? The first sentence in my question is the most important though, is it even a good idea in today's market. I'm looking to buy a duplex or small apartment building. I have no experience but a considerable amount of money I'd like to invest into a rental property or even properties.