iBooks-Textbooks Released

I am stoked....and it is not often that I get this way, but Apple has teamed with The McGraw Hill Company to create textbooks for the iPad.  I just downloaded an Algebra I textbook and have highlighted text, defined words via the glossary, internet and wikipedia, manipulated charts and graphs, highlighted texts, and participated in a personal tutor video regarding the slope formular (y=mx+b).  The personal tutor consisted of video and audio instruction that resembled a classroom white board.  It allows you to stop, rewind, pause and fast-forward the instruction.  All of this and more for just $14.99 (plus and iPad at $499). For more information click on the links.
http://www.apple.com/education/ibooks-textbooks/  http://m.ctv.ca/topstories/20120119/apple-textbook-ipads-ibooks2-120119.html .  I forgot to mention that I watched an "across the curriculum" video of the manatee.