Less than four years after their introduction, Kindle electronic books are now outselling physical books on Amazon.

Since April 1, for every 100 print books Amazon has sold — including paper books for which there are no Kindle books available — it has sold 105 Kindle books. The company has sold more than three times as many Kindle books in 2011 as it did in the same time period in 2010.

News of the coup comes less than a year after Amazon announced that sales of its digital book format had surpassed hardcover sales, and less than four months after Kindle sales surpassed paperback sales.

“We had high hopes that this would happen eventually, but we never imagined it would happen this quickly,” said Jeff Bezos, Founder and CEO in a statement.

I actually started writing the rest of this as an email to my friend Marsha in Santa Cruz when it occurred to me I should share it in the form of a post with the rest of the world…

I have found that with business books and ‘technical stuff’ that buying Kindle books from Amazon works better for me. Why?

• Delivery is instant
• Cost is cheaper
• I can read them at the computer while sitting up and paying attention, or on my Android phone or iPad, or Chromebook while mobile — wherever!
• I can highlight or bookmark wherever I’m reading and it is synced to my virtual library
• I can copy and paste and put the notes in Evernote, a blog post or an email, etc.

These are just a few of the reasons why I love the Kindle platform! btw, I don’t own a hardware Kindle yet — I just use their software platform — but I will buy multiple Kindle Fires for myself and my wife, etc.