The Power of Introverts

So I've heard about TED talks before - in fact I've even started watching a few.  But this is the first one I've ever actually watched all the way through.  Susan Cain is amazing!  Now I really want to read the book - but I'm number 177 on the waiting list for the ebook from the library.  Should I just cough up the $17 for the Amazon Kindle version?