Yes - the "X" works, but being old and set in my ways, I really like a button that says "Close" right next to Save.
And, yes, the bigger point is that there are hundreds of new buttons that you can add to the toolbar. If Close isn't your thing, then try Paste Values, or Select Visible Cells.
For the free book...over 6 million chapters have been given away - if you are patient, you get the whole book for free over the course of the next year. People thought I was crazy to give away the whole book for free. However - I love these statistics: (1) Most people - perhaps 95% - don't buy the book - they just get the free chapters. This is fine. People learn more about Excel and are more efficient. (2) However, by giving away the book, word spreads so much faster. This means that the few percent who do buy the book cause the book to sell at three times the normal rate!
Like Leo Laporte says on his TWIT podcast, some people just like to own a physical book. The free chapter promo lets me get the word out to more people.
So, there are two free books going on right now:
1) Every Tuesday, Learn Excel from MrExcel:
http://www.mrexcel.com/learn-excel.html
2) Every Thursday, Excel 2007 Miracles Made Easy:
http://www.mrexcel.com/freebook2007/
No catch. No gimmicks. No spam. Opt out any time. The link arrives by e-mail each Tues/Thursday and if I ever *need something*, I will ask in the e-mail. For example, in the famous quest for "what the heck can =FACTDOUBLE() be used for?", I asked that in the weekly e-mail and had an answer (calculating Texas Hold-Em Poker Odds) quickly.
Bill