Another reader I use (in addition to MS Reader which is still my favorite and all I would use for .LIT) but I started reading one that was an .htm and I believe it works for PDF also. Long story short it is called uBook Reader. I can't remember if it's free or not but I'm pretty sure it is. I do like it though. Check it out and let me know what you think.
http://www.gowerpoint.com/