Good source on internet to read books..

Ofcourse, there are Google Books, Wikibooks, Project Gutenburg & iBiblio.

What other libraries would you recommend on the internet?

From stackoverflow Prakash

• Although it's a pay service, Books 24/7. I do prefer having an actual, physical book in front of me, though.

  FortunateDuke : I agree nothing beats a physical book.
  From Thomas Owens

• Not free, but the best, O'Reilly's Safari

  Rob Wells : Totally agree. Been using it since it started and find it invaluable.
  From Vinko Vrsalovic

• Dailylit is kind of neat. They break up books into instalments. These can either be emailed to you daily, or you can set up an RSS feed.

  It's a mixture of free and paid content.

  From manobes