>For a New Liberty
>The Ethics of Liberty
>Democracy, the God that Failed
>Human Action OR Man, Economy and State with Power and Market
>Economics in One Lesson
>The Myth of National Defense
>The Problem of Political Authority
>The Road to Serfdom
I'd say if you read these ten books, you know as much about libertarianism as most libertarians. Although Human Action is easily as long as three or four books, and MES is even longer. I don't know what exactly you want, if you just want a crash course, then you can remove the longer economic treatise, or you can keep it and remove Choice and Economics in One Lesson.
I've read all of these books (except MES, still on that), and like ten or twenty more, but I don't think I'm representative for libertarians more broadly. We are a wellread bunch but if you just read ten, no libertarian, I think, wil be able, in good conscience, to tell you to just read a book.