Microsoft TechNet–Create PDF Takeaway chapters for your set of topics–great feature just added..
If you’re like me, having those PDF version for offline review are great. It was a pain before as I had to individually print web pages to single PDF using tools.
Now, TechNet can track a “book” of topics for you, and then generate HTML or PDF for you to download – personal publishing 
Roll-your-own techdocs for free - TONYSO - Site Home - TechNet Blogs