A few people have been looking for a book that is included with Lightroom. Many people have stated that it does not come with a book.
To clarify things, Yes, a lucky few of us did get an 80page printed booklet with our Lightroom called
'Adobe Photoshop Lighroom - Getting Started Guide'. I just found the book in my ' Land of the Lost' book library of all the Adobe classroom in a book Books and after a bit of searching with info from the book, I found it at the Adobe website.
Here is a link to this 80 pg book from Adobe for all the people that want a getting started guide for Lightroom, even better for people trying out he free trial of Lightroom. This appears to be an exact .pdf copy of the printed book that I received with one of my versions of Lightroom.
http://http://www.adobe.com/designcenter/lightroom/pdfs/lightroom_gettingstarted_lo.pdf
Download the PDF and enjoy.