Be it in .pdf or html formats, I just wanna read it.
Check your local library. Our country library system has three copies. 
I haven’t seen any .pdf versions of it, but I got mine rather cheaply through Barnes & Noble.
As for .pdf books, I just downloaded two tomes of Austrian thought: Human Action and Man, Economy and State with Power and Markets. Normally, I would have bought them, but, as I’m still a broke university student (even if I am about to graduate), I’ll take the free version for now and buy a printed copy later when I am of better means to do so.
I’m pretty good at finding stuff on this here interweb and the only thing I could find was the cartoon version that’s free.
Amazon had it for $9 or something like that and my sister gave me a gift card last Christmas…
A bit off topic, but I am happy as I finally ordered Man, Economy and State with Power and the Market today. It’ll be a good few weeks worth of reading (and re-reading…)
I plan to go through it with the study guide as soon as I get some downtime.
So…if it’s not available anywhere else, why doesn’t the Mises Institute offer it on this site?
copyright issues
The only online version available is the IEA’s Reader’s Digest condensed version which you can acces here in pdf.